<p>Sparknotes has a book out that features 10 sat practice tests that feature in-depth explanations of the answers. it's only $15, so i may get it, but have you guys heard of it? and if you did, do its practice tests properly model the real SAT tests by the college board, and how does it compare to other books like Barron's and the blue book? Also, the book allows you to grade the tests yourself by converting your raw scores through a scale; how accurate is the scale?</p>