The New York Times and Washington Post bestselling serial-killer thriller that will leave you wondering, is the past really in the past? Three Chicago women have been found strangled, embalmed, and posed as if still alive. Doubting the findings of the local PD’s profiler, The FBI calls on forensic psychologist Zoe Bentley to investigate. Zoe quickly gets off on the wrong foot with her new partner, Special Agent Tatum Gray. Zoe’s a hunter, intense and focused; Tatum’s a smug maverick with little respect for the rules. Together, they must descend into a serial killer’s psyche and untangle his twisted fantasies, or more women will die. But when the contents of three inconspicuous envelopes reveal a chilling connection to gruesome murders from Zoe’s childhood, suddenly the hunter becomes the hunted.

A forensic psychologist fights a mental war against two serial killers in this disturbing thriller from Mike Omer, Washington Post and Amazon Charts bestselling author of A Killer’s Mind. An online video of a girl clawing at the ceiling of her own grave could be the worst thing FBI forensic psychologist Zoe Bentley has ever seen. Perhaps even more disturbing is the implication of the video’s title: “Experiment Number One.” Zoe and her partner, Special Agent Tatum Gray, work as fast as they can to find the monster behind the shocking video, but soon another one shows up online, and another girl turns up dead. Meanwhile, a different murderer is on Zoe’s mind. Rod Glover has been tormenting her since childhood, and his latest attack is a threatening photo of himself with Zoe’s sister. As Glover’s threats creep toward action, Zoe’s torn between family and duty. Zoe must think fast to prevent another murder. With her own family’s safety on the line, Zoe feels she’s never been in more danger. And while she’s always known her job could send her to an early grave, she always assumed she’d be dead first.

From Washington Post and Amazon Charts bestselling author Mike Omer comes the chilling conclusion to Zoe Bentley’s decades-long nightmare. A murderer who drinks his victim’s blood? FBI profiler Zoe Bentley and Agent Tatum Gray thought they’d seen it all, but this young woman’s barbaric murder is especially hard to stomach. They didn’t expect to work this case. But vampirism aside, the murderer’s MO is identical to that of Rod Glover—the serial killer who’s been pursuing Zoe since childhood. Forensics reveals the murder to be his work, but not his alone; desperate to fulfill his sick purpose, he has taken on an equally depraved partner. Zoe’s own frustration grows after another woman turns up dead and drained—and another goes missing. Time is running out: Zoe knows her own death will be the climax of Glover’s sinister play, which has been unfolding for twenty years. To stop Glover and his vile partner, she’ll need to plunge deep into their motives; but this means drawing ever closer to becoming another casualty of a dark, dark thirst.