Wed.–Sun., Sept. 20–24, 10 a.m.–6 p.m.
Festival Pavilion, Fort Mason Center
The largest used book sale on the West Coast supports the S.F. Public Library and features over 250, 000 books and other media for $3 or less. On Sunday prices drop to $1. Free, 415-626-7500, friendssfpl.org, Free, 415-626-7500, friendssfpl.org