The Official SAT Study Guide published by collegeboard itself is considered as the best study guide for SAT test.

You can find more information on “The Official SAT Study Guide” here:
http://store.collegeboard.com/productdetail.do?Itemkey=007182

You can find few more books that are considered best for SAT preparation at about.com here:
http://testprep.about.com/od/sati/tp/SATbooks.htm

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