Must Read: Psychological Thriller Books+Best thriller books of all time
you must be wondering: what are “suspense books”? Suspense isn’t a genre in and of itself, but — it’s a combination of mystery, thriller. That makes suspense books more heart-pounding, blood racing to read. If you are a fan of these three genre mysteries, thriller, and suspense you know that once you start reading them. You can not stop without finishing them. Likely we are here to give you dozens of these books.
20 Best Selling Author in Mystery, Thriller and Suspense : Best Books of all time
Trust me when I say these are best selling books.
My list also includes :
New York Times bestselling books,
New York Times bestselling author.
The Sunday Times bestsellers.
You can not stop yourself to turn the pages. From edge-of-your-seat psychological thrillers to gripping crime novels, 2020 is set to be a nail-biting year for thriller books.
To add a bit of excitement to your bookshelf, we found some of the best thriller books out there.
When We Believed in Mermaids: A Novel (Barbara O’Neal)
Read book review
I picked up When We Believed in Mermaids because I enjoyed The “Art of Inheriting Secrets” by this same author very much, with just a few quibbles. The same is true about “When We Believed in Mermaids”, including the quibbles. Both are stories where events in the present cause the narrator(s) to search through their own pasts as well as the past of a place that they become involved within the course of the story, so if you like the one you’ll definitely like the other.
“Kit was working in the ER when she looked at the TV and saw her dead sister of fifteen years. Her sister Josie was supposedly killed in a terrorist train attack in France. On the TV there was live coverage of a nightclub fire in Auckland and the woman on the screen looked identical to Kit’s sister. Kit decides she is going to go to Auckland and find her.
The book is told in two perspectives Kit and Mari, which is her sister Josie. She stole someone’s identity and is going by Mari now. She is married and has two children and loves her life. While Kit is an ER doctor and is very lonely. When Kit gets to Auckland she is on her search for her sister and she meets a man who she can confide in and talk to about her sister and they end up having a romantic relationship.”
When We Believed in Mermaids is a truly beautiful novel. It’s a new take on the classic family drama, and it is guaranteed not to disappoint.
Find Me (Inland Empire Book 1)
Read book review
Convicted serial killer Benjamin Fisher has finally offered to lead San Bernardino detective Daniel Ellis to the isolated graves of his victims. One catch: he’ll only do it if FBI profiler Reni Fisher, his estranged daughter, accompanies them. As hard as it is to exhume her traumatic childhood, Reni can’t say no. She still feels complicit in her father’s crimes.
Perfect to play a lost little girl, Reni was the bait to lure unsuspecting women to their deaths. It’s time for closure. For her. For the families. And for Daniel. He shares Reni’s obsession with the past. Ever since he was a boy, he’s been convinced that his mother was one of Fisher’s victims.
A five-hundred-mile road trip lies ahead. Thirty years of bad memories are flooding back. A master manipulator has gained their trust. For Reni and Daniel, this isn’t the end of a nightmare. It’s only the beginning.
Opium and Absinthe: A Novel (Lydia Kang)
Read book review
New York City, 1899. Tillie Pembroke’s sister lies dead, her body drained of blood and with two puncture wounds on her neck. Bram Stoker’s new novel, Dracula, has just been published, and Tillie’s imagination leaps to the impossible: the murderer is a vampire. But it can’t be—can it?
A ravenous reader and researcher, Tillie have something of an addiction to the truth, and she won’t rest until she unravels the mystery of her sister’s death. Unfortunately, Tillie’s addicted to more than just truth; to ease the pain from a recent injury, she’s taking more and more laudanum…and some in her immediate circle are happy to keep her well supplied.
Tillie can’t bring herself to believe vampires exist. But with the hysteria surrounding her sister’s death, the continued vampiric slayings, and the opium swirling through her body, it’s becoming increasingly difficult for a girl who relies on facts and figures to know what’s real—or whether she can trust those closest to her.
Never Look Back (Mary Burton)
Read book review
Expect the unexpected in this gritty, tense, and page-turning mystery from New York Times bestselling author Mary Burton.
After multiple women go missing, Agent Melina Shepherd of the Tennessee Bureau of Investigation makes the impulsive decision to go undercover as a prostitute. While working the street, she narrowly avoids becoming a serial killer’s latest victim; as much as it pains her to admit, she needs backup.
Enter lone-wolf FBI agent Jerrod Ramsey. Stonewalled by a lack of leads, he and Melina investigate a scene where a little girl has been found abandoned in a crashed vehicle. They open the trunk to reveal a horror show and quickly realize they’re dealing with two serial killers with very different MOs. The whole situation brings back memories for Melina—why does this particular case feel so connected to her painful past?
Before time runs out, Melina must catch not one but two serial killers, both ready to claim another victim—and both with their sights set on her.
The Other Daughter (Lisa Gardner )
Read book review
Twenty years ago a serial killer was put to death in the Texas electric chair. On that same night, a nine-year-old girl with no memory of who she turns up in a Boston hospital where Harper Stokes, a doctor and the wealthy father of one of the victims works. Harper’s wife is taken with the little girl who reminds her so much of her own lost daughter. The Stokes family decides to adopt the child and call her Melanie. Throughout the years, Melanie has lived in the lap of luxury, and although her life is not entirely idyllic, she always thought her family loved her…until one fateful night when a washed-up investigative journalist shows up on her doorstep claiming that she is really the daughter of a violent killer, the same man who murdered the Stokes’ first daughter.
Melanie vehemently denies the reporter’s claims, but some strange dreams she has been having about Meagan Stokes make her begin to have unwanted doubts about her adopted family. Melanie becomes acquainted with David Riggs, an FBI agent who is investigating her father and ex-fiancé for insurance fraud, just before she and the rest of her family begin receiving disturbing notes and “gifts” from an anonymous stranger who seems intent on tormenting them with the past. Just as Melanie decides to hear the reporter out, he is gunned down by an assassin, and she and David are nearly killed as well. Melanie finds her life on the line as a twenty-five-year-old murder investigation is reopened, and asking the question: If the man who confessed didn’t kill Meagan Stokes then who really did, and why are they out to get her now?
Must read: Discrimination & Racism Books
The Chemist: The compulsive (Stephenie Meyer)
In this gripping page-turner, an ex-agent on the run from her former employers must take one more case to clear her name and save her life.
She used to work for the U.S. government, but very few people ever knew that. An expert in her field, she was one of the darkest secrets of an agency so clandestine it doesn’t even have a name. And when they decided she was a liability, they came for her without warning.
Now she rarely stays in the same place or uses the same name for long. They’ve killed the only other person she trusted, but something she knows still poses a threat. They want her dead, and soon.
When her former handler offers her a way out, she realizes it’s her only chance to erase the giant target on her back. But it means taking one last job for her ex-employers. To her horror, the information she acquires only makes her situation more dangerous.
Resolving to meet the threat head-on, she prepares for the toughest fight of her life but finds herself falling for a man who can only complicate her likelihood of survival. As she sees her choices being rapidly whittled down, she must apply her unique talents in ways she never dreamed of.
In this tautly plotted novel, Meyer creates a fierce and fascinating new heroine with a very specialized skill set. And she shows once again why she’s one of the world’s bestselling authors.
Bad Monkey (Carl Hiaasen)
Bad Monkey is vintage Hiaasen. A quirky protagonist surrounded by even quirkier characters mired in oddball intrigue—all in South Florida, of course.
This story revolves around Florida Keys detective Andrew Yancy, newly busted to the role of restaurant inspector, aka “roach patrol,” for attacking one Dr. Clifford Witt, husband of a former Yancy lover, with a handheld Black & Decker vacuum cleaner—all videoed by cruise liner tourists with cell phones in hand.
Yancy embarks on several hit and miss attempts to get his badge back. No easy proposition. Particularly since his boss, Sheriff Sonny Summers, opinion is that Yancy was lucky they didn’t “charge you with sodomy.”
Come Sundown: A Novel (Nora Roberts)
Read book review
A novel of suspense, family ties, and twisted passions from the #1 New York Times bestselling author of The Obsession…
The Bodine ranch and resort in western Montana is a family business, an idyllic spot for vacationers. A little over thirty thousand acres and home to four generations, it’s kept running by Bodine Longbow with the help of a large staff, including new hire Callen Skinner. There was another member of the family once: Bodine’s aunt, Alice, who ran off before Bodine was born. She never returned, and the Longbows don’t talk about her much. The younger ones, who never met her, quietly presume she’s dead. But she isn’t. She is not far away, part of a new family, one she never chose – and her mind has been shattered…
When a bartender leaves the resort late one night, and Bo and Cal discover her battered body in the snow, it’s the first sign that danger lurks in the mountains that surround them. The police suspect Cal, but Bo finds herself trusting him – and turning to him as another woman is murdered and the Longbows are stunned by Alice’s sudden reappearance. The twisted story she has to tell about the past – and the threat that follows in her wake – will test the bonds of this strong family, and thrust Bodine into a darkness she could never have imagined.
The Forgotten Garden: A Novel ( Kate Morton )
Read book review
Thirty-eight-year-old Cassandra is lost, alone, and grieving. Her much-loved grandmother, Nell, has just died and Cassandra, her life already shaken by a tragic accident 10 years ago, feels like she has lost everything known and dear to her.
But an unexpected and mysterious bequest from Nell turns Cassandra’s life upside down and ends up challenging everything she thought she knew about herself and her family. Inheriting a book of dark and intriguing fairytales written by Eliza Makepeace Rutherford – the Victorian authoress who disappeared mysteriously in the early 20th century – as well as a cliff-top cottage on the other side of the world, Cassandra takes her courage in both hands to follow in the footsteps of Nell, on a quest to find out the truth about their history, their family and their past; little knowing that in the process, she will also discover a new life for herself.
It is hard to say too much about this novel’s storyline without giving away key elements of the mystery, so I will focus on my reading, or in this case, listening experience.
The Forgotten Garden had just the right amount of mood, mystery and complexity to reel me in and keep me hooked for the entire 20+ hours this audiobook spans (560 pages in paperback).
Devoted: The gripping (Dean Koontz)
new crime thriller from the No.1 Sunday Times bestseller.
From Dean Koontz, the international bestselling master of suspense, comes an epic thriller about a terrifying killer and the singular compassion it will take to defeat him.
In this story, a 3-year-old golden retriever named Kipp is largely responsible for this evolution. He is no ordinary dog. He is one of the “Mysterium dogs” living in California with a big secret: They can’t speak, but they are as intelligent as human beings. Kipp even enjoys novels like “Great Expectations.” These dogs could be the result of genetic engineering, but no one knows their history or origin.
The Mysterium dogs stay in touch with each other on “the Wire,” a telepathic communication medium unique to them. One day, Kipp hears a strange murmur that seems to come from a human boy. The boy seems to need help, so Kipp goes to find him.
Armada: A Novel (Ernest Cline )
Read book review
The new novel Armada is Ernest Cline’s follow-up to Ready Player One, his hit novel about virtual reality and pop culture Easter eggs. It’s almost obligatory to describe Armada as a follow-up, because that’s what it is in every sense: it has the same earnest nostalgia for the ‘80s and the same young protagonist whose knowledge thereof unlocks an epic quest. It takes place in a different universe, technically, but in truth it’s in the exact same world: the world of fandom.
The book’s main character is Zack Lightman, a teenager who is obsessed with the ‘80s because of an absent father who left him with boxes filled with movies and games. After fighting with the school bully, talking to his mom about his future, and digging through his father’s movie-fueled conspiracy theories, the real action begins. Because of his skills at a video game, he’s recruited by the Earth Defense Alliance (the same entity in Armada, the game) into an actual fight against aliens. The video game is real, it turns out, and humanity has been engaged in a secret battle and has been using video games and movies to prepare the populace for all-out war. It’s the plot of Ender’s Game and The Last Starfighter on purpose: those pieces of culture, you see, were seeded by a secret government program to subliminally prepare us for the coming alien onslaught.
Thin Air (Lisa Gray)
Read book review
“Lisa Gray explodes onto the literary stage with this taut, edge-of-the-seat thriller, and her headstrong protagonist, Jessica Shaw, reminiscent of Lee Child’s Jack Reacher, delivers a serious punch.” —Robert Dugoni, New York Times bestselling author.
Private investigator Jessica Shaw is used to getting anonymous tips. But after receiving a photo of a three-year-old kidnapped from Los Angeles twenty-five years ago, Jessica is stunned to recognize the little girl as herself. Eager for answers, Jessica heads to LA’s dark underbelly. When she learns that her biological mother was killed the night she was abducted, Jessica’s determined to solve a case the police have forgotten. To solve her mother’s murder and her own disappearance, Jessica must dig into the past and find the secrets buried there. But the air gets thinner as she crawls closer to the truth, and it’s getting harder and harder to breathe.
Very few authors debut as bestsellers even less arrive on the scene with a genuinely outstanding novel and yet Lisa Gray confidently achieves both. Conceptually powerful with a superb multi-layered plot allegory is one of the hardest fictional ploys to sustain for any length of time but here Gray tackles identity in a way that is both intelligent and gripping. With some authors, characters beyond their protagonists often seem little more than abstractions but Gray’s characters bring genuine depth and alignment within her overarching narrative. Ultimately though, the success of Thin Air comes from a combination of Gray’s ability to combine a credible story with her ability to convey intense emotions in simple, unaffected prose and this is one area in which she clearly excels. Add to this the fundamentals of a taut edge of your seat thriller and it’s no wonder Gray has charted in Amazon’s Top 20.
In the Heart of the Fire ( Dean Koontz )
Read book review
From #1 New York Times bestselling author Dean Koontz comes In the Heart of the Fire
In the Heart of the Fire is mostly a solid, and surely disposable, bit of entertainment. It’s the kind of story that doesn’t ask of lot of the author, mostly because it’s a highly slimmed-down reduction of the highly formulaic stories Koontz has been telling for decades now, nor does it ask much of the reader besides an hour or so of attention and a lack of better things to read. Even miss much here. The character of Nameless, dubbed so because of the then, you could mentally check out for a few pages at a time and not really amnesia that has wiped out all but the last two years of his memory, is basically Koontz’s high-tech, supernatural version of Lee Child’s Jack Reacher or a far less engaging riff on the old Lance Henriksen show, Millennium. He’s a clairvoyant nomad, working for a secret organization that relies on superior computer hacking skills to deliver justice outside the reach of the law.
In this introduction to Nameless, he’s traveled to a small Texas town under the iron fist of Sheriff Russel Soaked, a pedophile. Soaked has targeted a single mother, intent on snatching her child for his version of fun in his underground playroom. Those who have crossed paths with Spaces have gone missing, and Nameless is in town to put an end to his predatory reign.So, this introduction to Nameless isn’t particularly good, but it’s not entirely bad either, making it a perfectly middle-of-the-read, unenthusiastic three stars. It’s one of those book’s that’s just kind of there and has been done better elsewhere by plenty of other writers. If you’re looking for something you can read with your brain parked in neutral, I suppose you could do a lot worse than In the Heart of the Fire. Of course, you could also do a hell of a lot better, and frankly that’s been true of Koontz books for going on two decades now.
Memory Man (David Baldacci)
This is the first time I’ve read a book by David Baldacci. I didn’t know what to expect from it, but just that many have been recommending me to try.
Two cases sixteen months apart, connected to a person and perhaps through the person’s memory. That person… Amos Decker. The first crime was the murders of his family. The second, a school shooting. It sends Decker, the local PD he once worked for and the FBI on a hunt for a killer who seems to have entered stealthily and left without a trace.
Straight up, I loved Amos Decker’s character. Flawed but human, superhuman because of an event from his past, his memory both his strength and his weakness. It fit. His ability to analyse what he had seen, heard before and what he saw in the present was wonderful. He was paired with Mary Lancaster, an ideal foil I felt, till Alexandra Jamison’s character entered the picture. I liked that. It suited Decker’s character sketch better. And of course, there was Bogart, the FBI man. Given the ending, there’s promise in this story series. I am looking forward to more.
The plot kept me turning pages. This is by no means a small book. But I finished it over two days. It was gripping. When the plot seemed to be heading nowhere, the author put in twist after twist to bring just the hint of meaning, making me want to know what would happen next. Loved that. Perfect for a thriller. The motive for the crime was somewhat justified from the criminal’s point of view too. In a way, the reader did feel sympathy and empathy to the criminal too. A first for me, I think.
Last Day (Luanne Rice)
Read book review
From celebrated New York Times, bestselling author Luanne Rice comes a riveting story of a seaside community shaken by a violent crime and a tragic loss.
“Rice, the author of more than 30 books, is a master at writing descriptions and portraying story settings, a skill other writers admire and strive to acquire.”
Luanne Rice’s opening pages of Last Day illustrate elegant writing at its finest. Clear, crisp and eloquent—sumptuous, even—readers will be tempted to read the passages more than once for the sheer pleasure of it ignoring for the moment that they describe a crime scene. Yes. There is a dead body.
Someone has murdered beautiful, wealthy, accomplished, and very pregnant Beth Lathrop leaving her body in an expensively appointed, overly air-conditioned room that is so cold the silver frame of a photo frosted over.
The cheating husband Pete has an alibi, but everyone suspects him anyway, mainly because nobody likes him. Beth’s sister Kate makes no secret how she feels:
“He’s an arrogant jerk with an inferiority complex. He acts as if he’s better than everyone—even Beth. But his feelings get hurt if you look at him sideways. Beth decided it was easier to let him have what he wanted. She isn’t someone who likes to fight. . . . He likes getting his own way.”
Others describe him as a creep, a liar, a cheater, “a dick” and worse. Even his 16-year-old daughter Sam doesn’t want to be with him.
Intricately drawn complex, perfect and perfectly flawed characters form a wide circle of family and friends covering five generations. The males for the most part are unremarkable except for a couple of bad daddies. It’s the women who are noteworthy, starting with grandmother Mathilda, a woman ahead of her time who chose not to marry but have children anyway, to a couple of modern-day super independent women who chose not to marry or have children.
Rice, the author of more than 30 books, is a master at writing descriptions and portraying story settings, a skill other writers admire and strive to acquire. The identity of the murderer will come as a shock. The clue, though seamlessly integrated and easy to miss, is definitely there early on.
Then She Was Gone: A Novel (Luanne Rice )
Read book review
Published in 2017, Lisa Jewell’s 15th novel Then She Was Gone follows the disappearance of fifteen-year-old Ellie Mack and her mother, Laurel Mack, as she learns to cope with life without her ‘Golden Girl’ and how it is okay to move on in life after a tragedy. Then She Was Gone is both a mystery and a domestic thriller that the author has broken up into five different parts with multiple narrators. Jewell manages to juggle each of the unique perspectives with different points-of-view while also bringing them together seamlessly to create a suspenseful storyline, but one that feels predictable. She takes themes such as grief and family dynamics and incorporates them well with various characters that provide some depth to the plot and help move the story along.
Jewell uses the disappearance of Ellie as a way to explore what happens to a family after a child goes missing and then not receiving answers for many years. She shows how differently people experience grief and how that impacts the family dynamic in a way that can become catastrophic to the family unit. Laurel Mack, mother of three, wife, and caretaker is portrayed as a typical mother who has lost her daughter and doesn’t have any answers. Laurel grieves intensely to the point where she pushes her aloof husband away because they are grieving differently and Laurel believes that they need to continue to be sad and not move on with their lives. She also damages her relationship with her other daughter, Hanna, because Laurel makes it clear that Ellie was her favourite and she admits that she wishes that it was Hanna that went missing all those years ago. There is also a third sibling, Jake, who is there but is a very forgettable character. The reader will learn that he is really only part of the story to move the plot along.
This is the second novel that I’ve read by Lisa Jewell and while I think she is a fabulous author, and I find her work entertaining, I’m finding that her stories in general can be a tad predictable and not as enriching as I would like. If you enjoy mysteries then you need to check out Then She Was Gone and other works by Lisa Jewell.
When We Believed in Mermaids (Barbara O’Neal )
Read book review
From the author of The Art of Inheriting Secrets comes an emotional new tale of two sisters, an ocean of lies, and a search for the truth.
Her sister has been dead for fifteen years when she sees her on the TV news…
Josie Bianci was killed years ago on a train during a terrorist attack. Gone forever. It’s what her sister, Kit, an ER doctor in Santa Cruz, has always believed. Yet all it takes is a few heart-wrenching seconds to upend Kit’s world. Live coverage of a club fire in Auckland has captured the image of a woman stumbling through the smoke and debris. Her resemblance to Josie is unbelievable. And unmistakable. With it comes a flood of emotions—grief, loss, and anger—that Kit finally has a chance to put to rest: by finding the sister who’s been living a lie.
After arriving in New Zealand, Kit begins her journey with the memories of the past: of days spent on the beach with Josie. Of a lost teenage boy who’d become part of their family. And of a trauma that has haunted Kit and Josie their entire lives.
Now, if two sisters are to reunite, it can only be by unearthing long-buried secrets and facing a devastating truth that has kept them apart far too long. To regain their relationship, they may have to lose everything.
To Kill a Mockingbird (Harper Lee)
Read book review
Harper Lee’s novel, To Kill a Mockingbird portrays an accurate reflection of people affairs in the southern United States during the 1930s. The story, which is set around a single-father household in rural community Alabama, includes a vast display of symbolism to connect the main plot with numerous subplots. Through her novel, Lee sets straight the old-fashioned Southern culture for the realism of Southern culture. The timing of this book also matched with the early Civil Rights Movement in the United States.
To Kill a Mockingbird highlights tons of themes and represents a general story from a local viewpoint. The overall dispute contains the obvious cry for justice, but at the same time mocks the civilization of Southern society.
Despite the fact that slavery was ended roughly a half a century before To Kill a Mockingbird was published, African Americans were still deprived of lots of their basic civil rights. Conditions were little improved up to the time when this novel was published. Blacks were degraded by the Southern society by the segregation of public bathrooms and drinking fountains, and also by forcing them to ride in the back of the public buses. In addition, there was still discrimination within the justice system. Blacks were excluded from juries, and could also be arrested, brought before a judge, and even found guilty with very little reason. There have been a countless number of cases in histories past where a white individual charged an African American of an alleged crime. This was seen throughout the book with the Tom Robinson case. Just like the jury in past trials, the jury for the Tom Robinson case was all white and all male; the trial was also held in a segregated courtroom.
Ultimately, this books’ purpose is about standing up for what you believe is right-and teaching those values to your children, because obviously Atticus’s behavior had a huge impact on Scout and Jem. It’s about family and extended family, and trying to hold everything together when the world seems to be falling apart. And it’s about compassion for everyone’s humanity. Read complete review here
When We Believed in Mermaids: A Novel (Barbara O’Neal )
Read book review
When We Believed in Mermaids is my first encounter with Barbara O’Neal’s work, but it definitely won’t be the last. This is a story that is nuanced and insightful, heartbreaking and life-affirming. It captures the essence of two souls, siblings who experience great tragedy in their youth and deal with it in very different ways. One becomes a successful physician while the other is content to disappear under horrific circumstances and construct a brand new life, one far away from California and everything she has ever known, even if that means leaving her sister behind for good. O’Neal writes as if she is creating a beautiful tapestry, weaving threads of her characters’ memories together one at a time, until they come together in a breathtaking work of art. And that’s what this story is.
O’Neal makes us examine our own youth through a different lens, to observe our parents and siblings as if through a kaleidoscope. One subtle turn transforms angels into demons, and in many ways, that is how the girls experience their lives. It is the subtle differences that ultimately create a chasm between them. Each has a unique story, even if they both grew up on the Pacific, surfing every opportunity they got, with parents who were admired by so many in a world that for most would seem like a golden life. But it wasn’t ever really that. Instead, it was a life plagued by abuse and addiction, one which marred the beauty and the possibilities of what should have been.
For all the readers who love gripping fiction by authors like Barbara Delinsky, Charlotte Vale Allen, and Catherine Ryan Hyde; remember this name: Barbara O’Neal. When We Believed in Mermaids is dramatic, authentic, and memorable. This is definite diamond review material, a story worthy to move to the top of your nightstand’s to-be-read pile.
The Atlantis Gene: A Thriller (The Origin Mystery, Book 1) (A.G. Riddle)
Read book review
On its surface, The Atlantis Gene: Book I is a science-fiction novel about good and evil. But, it’s more than that in its design. The novel contains wild conspiracy theories about the Nazi regime in WWII, 9/11, aliens, subterranean lifeforms—but all of those pale in comparison to the novel’s central idea: Alien lifeforms spliced pre-human DNA to create human consciousness, and there are latent portions of the human genome that, when activated, return alien powers to the humans. This idea is very close to spiritual transcendentalism, so one interesting way to interpret the plot is as a spiritualist narrative about the progress toward “enlightenment” which the novel calls “gene activation.”
As David and Kate progress together in their joint hero’s journey, they learn more about the world’s secrets. They learn that the Imari people want to destroy the superhuman Atlanteans, and they will stop at nothing to succeed in world domination. The heroes realize through this that their battle is not against actual villains, but the force of evil itself. The Imari merely symbolizes the ancient dilemma between right and wrong, good and evil. Notice also that the Imari operates as if their interests are ethical and obvious, but their methods reveal their true intent.
By the end of the novel, we’re all set up for a sequel. The issues of the first novel are considerable: Science, philosophy, WWII history, current events, religious transcendentalism, genetics, et al. By the end, the problem has become much more severe, and although David was roped into the story as a mercenary job, he has become twisted up in the plot so much that it’s now his story as well, not just the geneticist.