I have bought the newest Kaplan CK notes 2010-2011 (actual copies). They have red covers. You should get those, and not any earlier version, because they include many additions (e.g. 100 extra pages in Int Med). Other books also have a lot of extra pages.
EDIT: I think I'm mistaken. I guess 2008-2009 also include these additions. Please read my other post below.
EDIT: I think I'm mistaken. I guess 2008-2009 also include these additions. Please read my other post below.