For those of you who love the antiquarian hunt, there's also a separate section for the "Best of Book Bay," with rare and unusual books (between $20 and $250), including the first ever printed short story by Ernest Gaines (of "A Lesson Before Dying") in a SF State collection, and a rare collection of Matisse prints from 1958 (the most expensive, at $1800), among other gems.
Other events include a silent auction of artworks from the Reversing Vandalism show created out of the books damaged in a hate crime perpetrated by an anti-gay reader at the SF Main Library, and a reading of banned books all day Saturday by local San Francisco literati, including Leah Garchik and Joan Ryan of the Chron. SFist's dying just to go in and smell that great used-book aroma (they should bottle that stuff).