I agree with Jon. The Bibles provide an in-depth look at our methodology and are certainly helpful as a starting point. By their very nature, however, books are pedagogically static: you can read about our approach to, say, Assumption questions and understand the Assumption Negation Technique, but you cannot interact with the material in the same way you can in class. Having an instructor by your side is especially important when it comes to identifying and correcting errors in your application of these methods. Additionally, due to the page constraints of each Bible, we could only include so many questions for each LR question type (or game) to illustrate the applicable methodology. You will likely need additional questions to perfect that application and improve your pacing, which can be found in our course books.
A few caveats, however. A full-length course (in class or on-line) requires a significant time commitment, which many prospective students tend to underestimate. Whichever course you take, make sure you have enough time to complete your homework each week, and take practice tests after you cover the basics. If you're planning on taking the October exam, consider a class that begins early and meets about once/week, such as this one:
http://shopping.powerscore.com/product_ ... _2013_LSAT
Let me know if you have any other questions.