Instinct

Dr. Dylan Reinhart wrote the book on criminal behavior. Literally - he's a renowned, best-selling Ivy League expert on the subject. When a copy of his book turns up at a gruesome murder scene - along with a threatening message from the killer - it looks like someone has been taking notes. Elizabeth Needham is the headstrong and brilliant NYPD Detective in charge of the case who recruits Dylan to help investigate another souvenir left at the scene - a playing card. Another murder, another card - and now Dylan suspects that the cards aren't a signature, they're a deadly hint.

Dr. Dylan Reinhart wrote the book on criminal behavior. Literally—he's a renowned, bestselling Ivy League expert on the subject. When a copy of his book turns up at a gruesome murder scene—along with a threatening message from the killer—it looks like someone has been taking notes. Elizabeth Needham is the brilliant NYPD Detective in charge of the case who recruits Dylan to help investigate another souvenir left at the scene—a playing card. Another murder, another card—Dylan suspects that the cards aren't a signature, but a deadly hint, pointing toward the next victim.

The murder of an Ivy League professor pulls Dr. Dylan Reinhart out of his ivory tower and onto the streets of New York, where he reunites with his old partner, Detective Elizabeth Needham. As the worst act of terror since 9/11 strikes the city, a name on the casualty list rocks Dylan's world. Is his secret past about to be brought to light? As the terrorist attack unfolds, Elizabeth Needham does something courageous that thrusts her into the media spotlight. She's a reluctant hero. And thanks to the attention, she also becomes a prime target for the ruthless murderer behind the attack.

Imagine everyone’s surprise when Carter von Oehson, a sophomore in Dr. Dylan Reinhart’s Abnormal Psychology class, posts on Instagram that he plans to kill himself. 24 hours later and still no one has seen him. Release the hounds. A massive search ensues. But when Carter’s sailboat rolls in with the tide without him or anyone else on it, the worst seems to be confirmed. He really did it . . . Or did he? The one person convinced he’s still alive is his father, Mathias von Oehson, founder and CEO of the world’s largest hedge fund.