Out of the Blues: Dealing With the Blues of Depression and Loneliness, Wayne Mack

Down, But Not Out: How to Get Up When Life Knocks You Down, Wayne Mack

Depression: A Stubborn Darkness, Edward T. Welch

When the Darkness Will Not Lift, John Piper

Spiritual Depression: Its Causes and Its Cure, D. Martyn Lloyd-Jones

Reformed Spirituality, Joseph A. Pipa & J. Andrew Wortman, eds.