Eastman's Illustrated Guide to California Card Room Chips & Checks - I'm not sure if this book is still available - it was published in 1998

California Guide - chip price guide - this is a listing of California card room chips and their values. It is produced by Armin Pfender and I guess you can buy it from him.

These are the best books for California chips. There are other guide books for other states and classes of chips.