Stella seems to have her whole life ahead of her: She has just graduated with a dual masters in Psychology and Criminal Justice, she is engaged to the man of her dreams after a whirlwind romance, and she is moving to the East Coast with him as she prepares for the wedding and searches for a dream job, hoping to be a criminal profiler. She is unbelievably excited for her life together with Chris—until she meets his family.

MMA champ-turned-FBI Special Agent and BAU specialist Dakota Steele is as tough as they come—and as brilliant, too, able to crack serial killers that no one else can.

In this best-selling mystery series, FBI Special Agent Ilse Beck, victim of a traumatic childhood in Germany, moved to the US to become a renowned psychologist specializing in PTSD, and the world’s leading expert in the unique trauma of serial-killer survivors. By studying the psychology of their survivors, Ilse has a unique and unparalleled expertise in the true psychology of serial killers. Ilse never expected, though, to become an FBI agent herself.

When a bloated body is found floating in international waters, twenty miles out at sea, Lily Dawn is called back to the Caribbean. But this is not a happy homecoming. She hasn’t seen her parents since moving to Miami ten years ago, and now her sister has been declared legally dead.

Harley, reeling from her being put on leave, from her long-term relationship falling apart, and from her father’s dying, is hardly ready to return to her hometown, to its long-buried secrets, and her tortured past. She spent her life escaping this small town—but, as she settles back in, she wonders: Might she have been wrong all this time? Yet as more bodies surface and as every clue leads to a dead end, Harley, clashing with her new partner, realizes she’s in a race against time.

FBI Special Agent Maya Gray, 39, has seen it all. She’s one of BAU’s rising stars and the go-to agent for hard-to-crack serial cases. When she receives a handwritten postcard promising to release 12 kidnapped women if she will solve 12 cold cases, she assumes it’s a hoax.

FBI Special Agent Daniel Walker, 40, known for his ability to hunt killers, his street-smarts, and his disobedience, is singled out from the Behavioral Analysis Unit and assigned to the FBI’s new Antiquities unit. The unit, formed to hunt down priceless relics in the global world of antiquities, has no idea how to enter the mind of a murderer.

May Moore, 29, an average Midwestern woman and deputy sheriff, has always lived in the shadow of her older, brilliant FBI agent sister. Yet the sisters are united by the cold case of their missing younger sister—and when an eerily similar serial killer strikes in May’s quiet, Minnesota lakeside town, it is May’s turn to prove herself, to try to outshine her sister and the FBI, and, in this action-packed thriller, to outwit and hunt down a diabolical killer before he strikes again.

The FBI is alarmed by the rash of killings on trains throughout the country, and they realize they have to put together a joint task force to tackle it. Through a partnership with the rail police, FBI Special Agent Cailtin Dare is chosen to spearhead the new unit designed to hunt killers using trains across the country.

A notorious stretch of highway is rife with serial killers, unsolved murders and missing-persons cases. The FBI, knowing it must crack this Bermuda Triangle of death, assigns its most brilliant mind—and flawed agent—Rylie Wolf, to dive headfirst into this road of danger. Rylie must tap her brilliant instincts to decode these cases and enter the twisted mind of killers—while battling demons from her own dark past.