Obviously this should not be your only or primary source of LSAT prep if you're serious about getting a high score on the test. You should be studying with actual tests from the LSAC, powerscore, taking a prep course, etc. That said, this book provides good practice and useful advice in a very affordable and compact book, albeit with some poorly written questions that were overall, of a lower standard than what I've encountered in official LSAT tests. My rating therefore isn't based on a pure assessment of its test preparation credibility, as I would the Powerscore Logic Games Bible, but how I used it. LSAT prep is all about constant practice and reinforcing your brain to work a certain way. For the times when you're on the bus, have free time between classes, on a plane, waiting around with nothing to do...it's great to have this compact book around. It offers hundreds of practice problems to strengthen your skills and memory with certain strategies and problem types, which remain relevant even if the quality of these questions are sometimes substandard. No complaints. Just be sure to supplement your studies with more rigorous and complete books/tests/courses.

Pass Key to the LSAT provides good/basic study tips and guidelines for the LSAT. This book is recommended for its information, affordability, and user-friendly layout.

I used this book mainly for the sample tests--but I found that I was scoring about 10 points worse on them than I was on actual, previously used LSATs or ones in other books. I don't think they use practice questions from LSAC, instead making them up (which does lower the price, but still...)