For the most recent (2013) edition of this book, see: http: //www.amazon.com/2nd-Edition-Ultimate-Guide-Grammar/dp/1492353299/ The most comprehensive guide to SAT grammar available. Thorough explanations cover virtually every concept tested, from the most common to the most obscure, and dozens of cumulative exercises teach you not only to recognize and correct errors but also to predict them. Includes an extensive list of idioms as well as a complete index of Writing questions in the Official College Board Guide, grouped by both error type and by test. Intended to be used in conjunction with the Official College Board Guide and with Eight Multiple Choice SAT Writing Tests: The Companion Workbook to The Ultimate Guide to SAT Grammar .