Which is the best book one can buy to help with SAT preparation?

I would say the best book for SAT prepartion is The Official SAT Study Guide...It is created by the makers of the SAT: CollegeBoard...they have about 8 pratice test that you can self score once your done. It has been a big help in my own preperation for the SATs. I hope I am being a big help...Good Luck in your SAT and college process!

I'd say the Princeton Review's "Cracking the SAT" helped me a lot... because I put a lot of effort into it, but most people don't actually have the initiative to study a book....

so you might want to consider taking a classroom course for the SAT. I did and I think the whole classroom atmosphere helped me a lot.