As chief of Harvard's Mental Health Service, Dr. Richard Kadison knows how mental-health problems affect college students. "I'm very convinced that academic growth and well-being go hand in hand with emotional growth and well-being," he says. His new book, "College of the Overwhelmed," written with Theresa Foy DiGeronimo, examines adolescent depression and gives advice to parents, teens and counselors about how to recognize and treat symptoms. Stakes are high: a recent American College Health Association survey found that more than 45 percent of students have felt so depressed that it was sometimes hard for them to function. Kadison hopes his book will motivate parents to pressure schools into providing adequate mental-health services: "Parents may be thinking about athletic facilities, but hopefully this will get them thinking about emotional resources as well."