Half Price Books Records Magazines
1935 Mount Diablo St
Concord, CA 94520 USA
The name of the place says why so many love 'em. And this branch often has a good selection of less obvious books. I've made some excellent math finds here, more even than in Berkeley. Many good food-related and cookbooks, too. And there's a great coffee shop on the same square (Panama Red), so you can pick up a book and head over to relax. Or sit in the nice park.