**T** **he "thrilling" #1** New York Times **and** USA Today **bestseller (Karin Slaughter): when three bodies are found in a Chicago bedroom, a black book goes missing . . . and the city has never been more dangerous.** Billy Harney was born to be a cop. As the son of Chicago's chief of detectives with a twin sister on the force, Billy plays it by the book. Teaming up with his adrenaline-junki...