<p>I have a Barron's SAT 23rd Edition that was published in 2007, and yes it's very old. But I bought a lot of other books this year and now I feel a great amount of guilt for buying another book. and plus, I already have one only it's really old. So I wanted to ask you if studying with Barron's book that was published in 2007 is a good idea. I also don't see big difference between 2007 Barron's and 2013 Kaplan in regards of types of concepts that they teach. Do you think I need to buy new version of Barron's or is it still ok to study with 2007 Barron's? btw I want to use Barron's b/c I heard it's more challenging that the actual SAT. </p>