I bought this guide for over $20. I found it very interesting, because it basically teaches students how to beat the test. I taught my SAT students what I thought they needed to know. They were self motivated to learn how to "cheat" on their own. I do not think that any student should just be taught how to beat the test. If you would like a more authorized version of SAT materials, see my SAT PowerPoints. The approcah in this guide is different, but it makes a lot of sense. These are not original, but resources that really helped me teach and understand strategies.