first book made me feel like a voyeur, privy to some great stories, this second one makes me feel as though I am reading a research paper. This is not to say that there aren't some great tidbits, but overall, I have to admit to being a bit disappointed with this one. "Keep the Change" offers many interesting, perhaps unique looks behind the scenes in various service industries, especially as they relate to tipping, and for this, it's a good read. However, what's lacking is a critical examination of the subject and the tenets of Dublanica's thesis that, well, you should tip all these various people exactly what they want, which you should know even if they don't tell you, and, if you don't, well, it's likely you have poor relationships in general and certainly don't understand how they work. It's quite a proposition. Dublanica covers several, though certainly not all, service industries, including valets, bartenders, strippers, masseurs, cabbies, hotel workers, and, of course, waiters. In addition to interviews, he occasionally moonlights at these jobs, or at least observes them in their environment. Not only does this allow him to write off lap dances as research, it gives the book its meat, the many human interest stories. You'll learn about girls who serve fetishists in a sex dungeon in LA, and all the truly strange stuff in that world. You'll hear about the cab driver in Vegas and the two, totally broke kids who force him to let them off