I referred to the Princeton review for the revised GRE.
In my opinion, it was spot on when it came to the RC's and essays. The math was pretty basic. That said, it was just right for the GRE. More important than the books, however, are the practice tests, in the run up to the GRE.
Also I'm reasonably good at cutting corners so I suggest you download Kaplan's GRE flashcards on your smart phone or iPod.
A few good free online tests are the ones hosted by Kaplan and Manhattan. The Princeton Review online test was pretty useless and the one by McGraw Hill was the pits. The power prep software is good too.
Last but not least, if you're hitting a road block with some of the math, try Khanacademy.com. It's especially good for the GMAT and it also clears up most of your GRE quant concepts.
All the best!