Book comparisons

<p>Math SAT 800: How To Master the Toughest Problems (recommended by sat takers) vs Barrons sat math workbook ( i own this)
i am kind of reluctant to buy a new book and i was wondering if my work book is just as sufficient or better or worse... please give reviews
Kaplan SAT Critical Reading Workbook vs Barron's critical reading workbook(i own this)
vs petersons master the sat critical reading workbook</p>

<p>Please review thanks!</p>