The Chemistry of Joy Workbook: Overcoming Depression Using the Best of Brain Science, Nutrition, and the Psychology of Mindfulness, by Henry Emmons, M.D., with Susan Bourgerie, M.A., L.P., Carolyn Denton, M.A., L.N., and Sandra Kacher, M.S.W., L.I.C.S.W. New Harbinger Publications, 2012, 216 pp., $21.95 (paper).