content: I purchased both the Princeton Review and the Kaplan GRE 1999-2000 edition book. I found that while the Princeton Review book had some good pointers, the Kaplan book was better organized and a lot easier (for me at least) to study from. If you're only going to buy one book, I'd suggest passing this one up and getting the Kaplan book.What really sold me on Kaplan was the fact that they divided up their list of vocab words into categories, instead of one big list.