So, when we hear statistics like "400 volunteers, 7,000 boxes of books, 300 tables and 200,000 books in over 50 categories", we might ordinarily have to reach for the NoDoz, but, wait: we're hearing these numbers from some of our fave folks, the Friends of the San Francisco Public Library.

What's making the Friends break out the big numerical guns? The 42nd Annual Big Book Sale, aka "the biggest book sale on the west coast", which runs until this Sunday at the Festival Pavilion at Fort Mason.

Admission is free, and the event runs today and tomorrow from 10:00 a.m.-8:00 p.m., Sunday from 10:00 a.m. to 6:00 p.m. Most books at the sale are priced between $2-$5, and all books on Sunday are $1 or less. Guess what day we'll be going!

But just because we're cheap doesn't mean you have to be -- stop by any time this weekend to check out favorite collections "like "Best of Book Bay" which features collectible rare books, first editions, as well as just plain strange books discovered by Friends volunteers." All the proceeds go to support the SFPL, so you can indulge your inner packrat, and support a good cause, all in one.