Tonight, the SF Indiefest anschlüss continues, with a party celebrating the Coen Brothers' The Big Lebowski at Balazo Gallery (2183 Mission at 18th). Costumes encouraged. (9pm)

Two great alcohol-accessorized reading events at the Make Out Room (3225 22nd St between Mission and Valencia): Friday and Saturday night is Mortified's annual doomed Valentine show with teenage stories of hopeless love, awkwardness and pain. (8pm)

All this weekend it's the California International Antiquarian Book Fair at the Concourse Exhibition Center (635 8th St at Brannan). The Fair, the largest of its type in the world will feature everything from Che Guevara's original tourist visa, to a Giant Illuminated Koran circa 1850, to the earliest printings of Mozart's The Magic Flute. Plus workshops on collecting, an Antiques Roadshow-like what's this book worth, and how to identify fakes.