The Killer Instinct series from New York Times bestselling author Cynthia Eden continues as an FBI profiler tracks a case that resurrects ghosts from his past 

Ex-SEAL Tucker Frost knows that the world is full of evil. He saw it in the face of his own brother, Jason Frost, a cold, methodical, sadistic killer. A killer Tucker put down with his own hands in order to save Jason's final victim—Dawn Alexander, the only girl who got away from the infamous "Iceman." 

It's Tucker's up close and personal experience with evil that's made him perfect for Samantha Dark's experimental profiling division in the FBI. Samantha wants agents who have personal ties with killers, who have unique insights into the minds of monsters. And when women start turning up murdered with the same MO used by the Iceman, Tucker is sent back to Louisiana to investigate. 

The last person he expects to see is his ex-lover, Dawn. Ten full years have passed since the night that Tucker faced down his brother…and since he last saw Dawn. But the dark need still burns just as hot between Tucker and Dawn. As they grapple with a desire that never died, they must also face the shared shadow from their pasts. Both Tucker and Dawn have the same question—has Jason Frost come back from the dead to hunt again? And this time, will he succeed in killing the victim who got away?