Kay Redfield Jamison
A psychologist at Johns Hopkins school of medicine her most recent book was a Pulitzer Prize Finalist, but she has written many classic books that are amazing. She is one clinical psychologist that you MUST read if you are in the field of mental health. She suffered from bipolar disorder herself, and by far stands out as my top 5 people to read.
Mary Ellen Copeland
Mary Ellen Copeland is an author, educator and mental health recovery advocate. She herself suffered from mental health issues and now advocates the Wellness Recovery Action Plan
His book is a classic but outdated. Very outdated. The newer version is Feeling Great: The Revolutionary New Treatment for Depression and Anxiety.This book too is slightly better, but more for those who believe in the power of positive thinking.