Whenever I'm stuck between books I just get all of them. I order them cheap off of Half.com. It's loading up my desk and bookshelves, but heck, more books for me!
But looking at the Barron's reviews, I think Amazon made a goof, because some of them are from like, 2002 and 2003, which would be a different edition. The
PR and Kaplan reviews are all up-to-date.