Chess books are the ultimate source of knowledge on chess. In technical terms, they can provide more detailed material than DVDs. Some players even credit 1800+ of their rating points to a single book! There is an abundance of chess literature out there and today, I'm going to go through some of my personal recommendations. I have broken the suggestions up into categories so they are easier to digest.
Opening books on specific openings are either superseded or go out of date quickly, so I'm not going to recommend any titles in that department. However, you can find some book/DVD recommendations that complement repertoires in my "opening repertoire suggestions" article...
See the full article "Chess Book Recommendations".