Here are a variety of books that have been helpful to other members. Some are geared toward specific goals, such as ASA certifications, others are general in scope.
Sailing Made Easy
The official learn-to-sail manual of the American Sailing Association and the United States Coast Guard Auxiliary.
Coastal Cruising Made Easy
Helpful for ASA Basic Coastal Cruising (103), Bareboat Charter (104) and Instructor Qualification 201, 203, 204.
Paul Elvstrom Explains the Racing Rules of Sailing
Great explanations along with a complete copy of the racing rules.
The US Sailing certification series book on basic keelboat sailing, corresponding to the ASA 101 certification.
The US Sailing certification series book on basic cruising, corresponding to the ASA 103 certification.
The US Sailing certification series book on coastal navigation, corresponding to the ASA 105 certification.