Let me qualify this firstly by saying I've read a fair bit of Elmore, I started with Bandits, moved through Freaky Deaky and Get Shorty, to Cuba Libra, Out of Sight, Glitz, Be Cool and Riding the Rap. Tishomingo is easily the best of the lot for me. A great central character, Dennis, with an interesting back story as a high diver, is paired up with a shady out of towner called Robert and helps him take over the business interests of the Southern Mafia. As you would expect, the dialogue and characterization are typically excellent; well drawn heroes and villains and their molls spitting out barbed language that sounds so fresh and real it's hard to believe Elmore hasn't been out on the streets with these actual people and recorded it.
Naturally the plot contains as many satisfying twists as ever, but what really made this one stand out for me above all the rest of Elmore's work was the sheer joy he seems to have taken in writing it. He clearly loves talking about old blues and civil war re-enactments from the way he goes into such detail about them, which makes it much more interesting for the reader. The locations are lush and vividly depicted, the action tense, and the conclusion hugely satisfying. If you're a fan already, get this. If you're a newcomer to Elmore, this will convert you. I hear it's going to be filmed as well, pray Soderbergh or Sonnenfeld gets it.