The Blade Itself by Marcus Sakey

Danny Carter has been leading a straight life for seven years, ever since his old partner Evan McGann went to prison for a crime they committed together. Now Evan is back and he believes that Danny owes him big for never mentioning Danny's name to the police years ago. Evan wants Danny to do a job with him. Danny isn't interested, but Evan is hell-bent on Danny being his partner once again. Will Danny be able to convince Evan that he's really out of the game or will the honest life he's built be destroyed in the process? Sakey has written a great first novel that's hard to put down. The Blade Itself has much in common with the novels of Dennis Lehane.