Books like Twilight by Dean Koontz

Tina Evans, reeling from her son Danny’s death, prepares a Las Vegas show and discovers a cryptic note—’NOT DEAD’—that forces her into a dangerous investigation across the High Sierras.

Odd Thomas and his soulmate Stormy Llewellyn, together with a ragtag group of allies, navigate a dark desert landscape where past and present collide. As murderers and supernatural forces emerge, they race to stop a looming cataclysm.

When a murderous sociopath stalks her friends in Napa Valley, former survivor Chyna Shepherd must guard herself and an innocent stranger, risking life and sanity to confront the deadly intensity of Edgler Vess.

Ordinary bank teller Timothy Carrier becomes embroiled in a lethal game of mistaken identity after a stranger hands him a ransom envelope, forcing him to outwit a hitman who thinks he’s the contract killer.

Landscape gardener Mitch Rafferty has only sixty hours to rescue his kidnapped wife, facing a ruthless ransom demand and a deadly confrontation that turns his suburban life into a relentless thriller.

In the secluded town of Snowfield, California, a shocking mystery unfolds after 150 people are found dead with grotesque injuries, sparking a chilling investigation into a mass murder that blurs the line between good and evil.

A bolt of lightning brings a blond-headed stranger into Laura Shane’s life, prompting her to question whether he’s a guardian angel or a devil in disguise.

In Dean Koontz’s thriller "Watchers," a genetically engineered dog gains human intelligence, stirring a deadly conflict when it escapes, endangering those who cared for it and unleashing a state‑level secret.

When a sterile silver rain engulfs a quiet Californian mountain town, a couple and neighbors discover that all communication has vanished and a hidden menace now stalks them, unveiling an apocalypse that threatens the world.

A geneticist obsessively seeks a cure for death, but an accident and a shattered head force him into a mysterious disappearance, leaving his ex-wife to guard his secret and a former lover confronting a deadly investigation.

A psychological thriller that follows Martie Rhodes as she and her husband Dusty confront a series of mind‑bending events involving a draconian psychologist, drug‑rehabilitated brother, and the terror of self‑fear.

Falling: Two FBI Agents Hunt the Vanishing of an Infant

FBI special agent Pierce Quincy teams with ex‑cop Rainie Connor to chase a psychopathic killer who preys on the minds of his victims, forcing them to confront the darkest fears close to home.

Suze, a teenage mediator who has grown accustomed to ghosts, finds love with deceased Jesse, a 19th‑century figure, and must decide whether to use her powers to change history and save him from death.

A suspenseful tale of a professor and his 12-year-old daughter in Venice, where they uncover a terrifying secret.

"I very much need to be dead." These are the chilling last words left by a man who had everything to live for but took his own life. In the void that remains stands his widow, FBI agent Jane Hawk, surrounded by questions destined to go unanswered unless she does what all the grief and fury inside her demand: Find the truth, no matter what. People of talent and accomplishment, people seemingly happy and sound of mind, have recently been committing suicide in surprising numbers. A disturbing pattern is beginning to emerge. Jane is determined to give up everything to find out why. And if that means going rogue and becoming America's Most Wanted, then so be it. Those arrayed against her are legion, and devoted to protecting something profoundly important-or terrifying-enough to exterminate any and all in their way. But Jane is as clever as these enemies are cold-blooded, as relentless as they are ruthless. And she is driven by a righteous rage they can never comprehend. Because it is born of love.

Consultant surgeon Tora Hamilton investigates a mutilated murder in remote Shetland and uncovers an ancient legend that turns her life into a lethal game.

When the Repairman Jack takes on a job to retrieve a stolen necklace, he is drawn into a concealed world of magic, winged monsters, and revenge, turning a routine recovery into a perilous adventure.

When an enigmatic telecom device opens a channel to the supernatural, a grieving former soldier must confront ghosts—both literal and literal—while battling his own unraveling mind.