I've also read a few Elmore Leonard books(going in order written):
Valdez is coming-solid western, pretty good read.
Forty Lashes less one-another good western
Mr. majestyk-A modern story, good action but not great. Wouldn't go out of my way to find it, but not bad.
52 Pick up. Not bad but not great. Another one that's non essential.
Swag. Has some good bits, but dies about half way through and doesn't quite get going again.
Unknown man #89. This is a damn good adventure, and with this one you start seeing his style emerge from good to great.
Also read Bad Monkey by Carl Hiaasen. Not one of his best, skippable unless you can find it really cheap, even then expect to be disappointed.