You're Not Alone: Understanding and Managing Depression 

Depression is a mood disorder that causes long-term feelings of sadness and worthlessness that interfere with daily functioning. More than 20 percent of adolescents have experienced depression while they were teenagers. With the help of facts and quotations as well as anecdotes about teens who have experienced depression, this book aims to explain what depression is, how it affects teens, how it is diagnosed, and how it is treated.