Rendezvous With Rama by Arthur Clarke
Stranger In A Strange Land, The Number Of The Beast, and The Moon Is A Harsh Mistress by Heinlein
Lawrence Block’s Matt Scudder novels
Donald Westlake’s (writing as Richard Stark) Parker novels
Replay by Ken Grimwood
You Gotta Play Hurt by Dan Jenkins
Lucifer’s Hammer by Larry Niven & Jerry Pournelle