Steven James 
Knight (The Bowers Files Book #3) [EPUB ebook] 

In The Knight, the third installment in the bestselling series of thrillers featuring FBI criminologist Patrick Bowers, the stakes have never been higher. Agent Bowers is used to tracking the country’s most dangerous killers, but now it looks like a killer is tracking him. When he realizes the murderer is using clues from an ancient manuscript as a blueprint for his crimes, Bowers faces a race against time to decipher who the next victim will be and to stop the final shocking murder–which he’s beginning to believe might be his own.Gritty, chilling, and intense, this psychological thriller is guaranteed to keep readers up all night.