Best book I've read about the psychology of those playing at the absolute top-end of the poker world- the kind of people who can win or lose hundreds of thousands of dollars on the turn of a card without batting an eye.
Both exhilarating and depressing, The Biggest Game in Town is about a gritty Las Vegas of the late 70's and early 80's- before the rise of the shiny mega-casino- and the chain-smoking, overweight, bizarre personalities who are compelled to live in the desert to match wits with the best poker talent on the planet.
If you want a book on poker strategy you'll probably want to look elsewhere. If you're thinking about selling the house and moving to Las Vegas to make your fortune I'd recommend you read this first to know what you're getting into. And if you're just fascinated by stories from the richest poker tables in the world this is one of the best you'll find.