Wed.–Sun., Oct. 31–Nov. 4, 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 (restocked daily) for $3 or less. On Sunday prices drop to $1. Free, 415-626-7500, friendssfpl.org