The Official Guide for Gmat Verbal Review: The Official Guide : the Only Study Guide With 300 Real Gmat Questions - and Their Answers - by the Creators of the Test
I didnt gain any real knowledge on the Verbal section for the GMAT. Reading Comp was fine and not too hard to do. The logical reasoning .... some of the answers even explained didnt sit well with me, especially on the weaken argument questions. Its impractical to assume what events occurred to weaken xyz's opinion. I just dont get it. Anyhow, the Sentence Structure part was difficult for me at first; however picked up on some clues by just comparing one answer with another answer.
If you agree, Inrecommend platinumgmat.com for better practice.
A good supplement and source of practice problems, although I found most of the questions to be too easy.
To study for the GMAT I recommend using the Princeton Review book, the GMAC Official guide, this book, the GMAC quant review, and the Kaplan Comprehensive book.
Good starting book. Very good to discovery GMAC's thinking patterns, because others materials can deviate a lot depending on the topic! This is a must-read! Bests, Cesar