Day Hikes On the California Central Coast Great book, wonderful series. This title covers 120 hikes from Santa Cruz to Ventura, all coastal hikes. Great detail: maps, elevation, difficulty and more.
Day Hikes Around Santa Barbara This title (and the following two) overlap only slightly with the California Central Coast book above. Inland hikes are covered with similar detail.
Day Hikes Around San Luis Obispo, 2nd Stone has hiked EVERY ONE of the trails in his excellent series. Nothing like feet on the ground for accurate information.
Day Hikes Around Monterey and Carmel 128 hikes from north of Monterey down through Big Sur. Good information; good series of books.