There are many good general guidebooks to California travel including: "The Unofficial Guide to California with Kids and Fun With the Family in Northern California." There is even a book called "Weird California" that will let you in on some of our states strangest destinations and best kept secrets.
We are lucky to have access to many city, county, state and national parks in our area. Day hikes and camping can help you get in shape and experience the unparalleled natural beauty around us. The Foghorn Outdoors series of books include: "California Camping," with listings of 1,500 tent and RV campgrounds, "California Waterfalls," with maps and descriptions of more than 200 waterfalls, and "250 Great Hikes in California's National Parks." The library has trail guides to local parks like Henry Coe too. If you do decide to go hiking, check out field guides to help you identify the birds, trees and wildlife you might see.