The Art of Power by Greene:
Granted, I am about halfway through the table of contents, but I'm intrigued. Greene breaks down the 48 'laws' of getting people to do what you want. Given that I am a rather pessimistic cynic, the appeal of the book should be obvious. (And yes Mom, it is Machiavellian, but sometimes people need a little bit of ruthlessness for the greater good.)
Greene has also written The Art of Seduction and The Art of War. If Power is as promising as it seems, I could be convinced to pick up the rest of the set.