I picked this book up because, though I've read Elmore Leonard occasionally before, I really took to the character of Raylan Givens in the TV series Justified, which is based on his appearances in two or three of Leonard's stories.
Here, Givens plays support to the bigger story of a bookie called Harry Arno, ready to retire but pulled into conflict with his Mafia employers by the FBI in the hope that he'll turn snitch.
Leonard can write this sort of story in his sleep. My biggest problem with a lot of novels is that they're often over-written, but here Leonard gets into each character, and into their stories, with the barest minimum of exposition, spare description, and pitch-perfect dialogue and prose. It's exactly how a thriller should be, and I'm loving it.
(Course, I haven't finished it yet - not far off, but not quite - so it could all go to hell in the last few pages.)