What's the Worst That Could Happen? (Donald Westlake)

I've read this before, and loved it just as much the second time! Max Fairbanks, a spoiled, rich egomaniac, caught Dortmunder red-handed in a botched small-time robbery, and added insult to arrest by laying a claim to a ring Dortmunder's lady May had given him. "What's the worst that could happen?" he asked, smugly. The rest of the book answers that question, as Dortmunder and his gang of quirky crooks make it their single-minded mission to relieve Fairbanks of the ring, and whatever else of value they could take in the process.