I also agree; M:TFOTH is a great all around source. A few other sources specific to rock climbing that might be fun to read are:
Royal Robbins: "Basic Rockcraft" - it's old and quirky, but fun, classic and very quotable, and does have a lot of good information.
John Long: "How to Rock Climb" - Good basic book by another funny guy.
Don Mellor: "Trailside Guide: Rock Climbing" - Good introductory book by a very good writer. This is a nationally published series, but Don is a local Adirondack resource who also happens to have edited the last several editions of the Climbing Guide to the Adirondacks.
TCD