Slayground
Richard Stark & Donald E. Westlake & Charles Ardai
Parker (14)
Tripwire
Lee Child
Jack Reacher (6)
The Assassin
Clive Cussler
Isaac Bell (8)
Please Pass The Guilt
Rex Stout
Nero Wolfe (45)
The Perfect Kill: 21 Laws for Assassins
Robert B. Baer