If you are looking to buy a TOEFL study guide, you should check out THE TOEFL BOOKSTORE. They link to Amazon for their TOEFL books and study guides, which means you usually save at least 10% on the TOEFL books. More importantly, if you look at the menu on the right side of the store, the books are sorted into categories, so that you can quickly find the book you are looking for. Have any of the readers here already used any TOEFL iBT books to help them study? If so, leave a comment letting us know which book you tried, and how helpful you found it.