The sale will include a wide variety of fiction and non-fiction for adults and children, records, cassettes, videos, and puzzles.
It will be open to the public on Saturday, 10 a.m.-3 p.m. and Sunday, noon to 3 p.m. On Sunday books will be sold by the bag.
The members-only presale will be Friday, 7-9 p.m. Memberships are available at the Los Altos Library but are not sold at the door.
Proceeds from the book sale will benefit the Los Altos and Woodland libraries.
For more information, call 948-7683 ext. 3519.