This book was very helpful. Its given me information on the test itself, such as how long each section is, the types of questions, and how it being on a computer makes it different. This book gives three approaches to vocab: roots, top 200 GRE words, and word groups by meaning. What has been useful is that the words come with a simple definition and then a sentence. The book states that learning words in context is easier and I would have to agree. The math also helped me brush up on my math. The writing section wasn't as much of a concren for me, but it was still helpful. This book also comes with access to on line materails. I found that the book and the on line materials didn't completly aline. This book helped me to very well on the test, but the most helpful resource I had was the cd that ETS sent me directly.