When Lisa Catherine Harper discovered that she was pregnant, she thought she knew what she was getting into - but surprises flooded her body and mind, from mood swings and sciatica to late-night cravings and morning sickness. At Diesel (5433 College Ave., Oakland) on Sunday, Mar. 6, Harper discusses her memoir A Double Life: Discovering Motherhood. Harper also co-edited the anthology The Dish: Making the Food that Makes Your Family. 3 p.m., free. DieselBookstore.com.