Reading materials can be very helpful. Here is a partial list of some books I have found to be both interesting and informative.
Depression and Anxiety:
Darkness Visible by William Styron (1990)
Waking Up: Climbing Through the Darkness by Terry Wise (2003)
Get out of Your Mind and Into Your Life [workbook] Hayes (2005)
An Unquiet Mind by Kay Redfield Jamison (1995)
Psychosis, Mental Illness & Dissociation:
I Never Promised You a Rose Garden by Joanne Greenberg (1964)
A Shining Affliction by Annie Rogers, Ph.D.
Surviving Schizophrenia: A Manual for Families, Patients and Providers by E. Fuller Torrey, MD (2006)
Personality Disorders:
Girl Interrupted by Susannah Kaysen (1993)
Stop Walking on Eggshells by Mason and Kreger (2010)
Buddhism and Psychology
Radical Acceptance by Tara Brach (2003)
A Mindful Path to Self-Compassion by Christopher Germer and Sharon Salzberg (2009)
Real Happiness by Sharon Salzberg (2011)
Mindful Eating by Jan Chozen Bays, MD (2009)