Peter Sagal, the hilarious host of NPR's brilliant "Wait Wait...Don't Tell Me!" pontificates on excess. During the course of the book, he visits a swingers club, hangs out with porn stars, drinks a 700 dollar bottle of wine, and interviews gambling kingpins. Sagal's observations are intelligent and often funny, but none of his conclusions about why people do what they do seemed particularly fresh.(However, I have devoted a good deal of my life to contemplating vice, so his findings might be more useful to a less degenerate reader.) Also, he comes across stuffier in writing than his surprisingly bawdy (surprising for NPR anyway) radio persona. That said, this was an enjoyable, amusing read.