Walk and Talk: 9 a.m.-3 p.m. Hike to Matilija Canyon with Obi Kaufmann, author of “The State of Water, Understanding California’s Most Precious Resource,” and Ojai naturalist Lanny Kaufer. $30 adults, $25 seniors 62 and older, $15 students 13-17. For directions and to RSVP, call 646-6281 or go to herbwalks.com.
Book Signings: 7 p.m. Chaucer’s Books, 3321 State St. In honor of “The Fourth Generation” by the late Roy Mankovitz, his son, Alan, who finished the novel after his father’s death, and Roy’s widow, Kathleen Barry, Ph.D., will sign copies of the book. Free. 682-6787.