Searching for a serial killer who leaves playing cards at the scenes of his crimes, police officer Elizabeth Needham teams up with brilliant professor Dylan Reinhart, whose book has been connected to the murders.

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 headstrong and brilliant NYPD Detective in charge of the case who recruits Dylan to help investigate another souvenir left at the scene--a playing...

Everyone is surprised when Carter von Oehson, a sophomore in Dr. Dylan Reinhart's Abnormal Psychology class, posts on Instagram that he plans to kill himself. Twenty-four hours later no one has seen him, and the only person convinced Carter is still alive is his father, Mathias von Oehson. What Mathias knows and how he knows it would ultimately reveal a secret so damaging that it would be as if he were committing suicide himself. Reinhart now finds...