To all you 2nd-4th years and beyond: Which review books in addition to First Aid did you use to study for Step 1? I'm at the end of Year 1 and a lot of graduating 4th years are selling their books for ridiculously cheap. Can anyone compare BRS vs. High Yield? How are Lippencott and Appleton & Lange for board review? Any other specific books that are "must haves"?