Schweser study guide what products do you recommend?

Hey Folks, I’m getting ready for December 2008 level 1. I plan on using the Schweser study guide. What does the typical candidate purchase from their website to prepare for December? How many books? What are the titles? How much does it cost? Also, Schweser says you can’t use previous exam material for the next exam. Is that a true statement? For example, If you don’t pass June 2008 level 1, can you use the same books and still pass in December 2008 level 1? Is this a false statement by Schweser so that they can sell more books? Please help… Brian =]