CB SAT study guide vs Barrons+PR?

Archive SAT Subject Test Preparation
1

<p>I borrowed an unused copy of the Barrons book for Math 2 and the PR Physics book from a friend. Will they suffice or should I also buy

  1. Only the CB book for ALL subject tests OR
  2. Only the CB book for Maths 1 and 2 OR
  3. Both CB books for Maths 1 and 2 AND all subject tests?
    The CB books are pretty expensive, and since I am only giving Phy and Maths 2, do you think they’re worth it?
    Thanks.</p>