Mind Hunter: Inside the FBI's Elite Serial Crime Unit
John Douglas and Mark Olshaker
"My opinion it was a landmark book. It was the first time that in the FBI, the Behavioral Sciences Unit was talking about real case files and real crimes that he himself investigated and solved. He basically went into the psychology of serial killers and what motivates them and what differentiates them from each other, as well as other criminal types.
I would recommend to anyone who's interested in true crime would really enjoy this book. It's a good introduction into criminal profiling, and the good thing about it is that John Douglas is a wealth of information. He spent 30 years in law enforcement, and at the FBI, and in the Behavioral Sciences Unit; and not only has he written this book, but he has written like five follow on books to this one, all of which have been New York Times best sellers. I give it four stars."