Hello! I am a college student studying for my certified somm. My school library has the 2001 addition, and as a student between buying wine to study and signing up for the classes one of these books is really expensive. How important is it that I have the newest addition?
The basic stuff you need for Certified (Bordeaux, Burgundy, etc.) hasn't changed too much. The rest you can fill in with online sources like the Guild, Wine Searcher, etc. I always give my old copy away when a new addition comes out. Probably not the wisest move in retrospect.