Again, posting here for lack of a Catholic Products forum, and also because Merton is of much broader appeal than just to Catholics (there's a large selection of his books at the Regent College Bookstore, for example).
Merton has been requested before, but a long time ago, and I thought he needed to be bumped onto the radar screen again.
This list is by no means exhaustive, but it's a start (and sorry I didn't have the time to look up all the links on Amazon.com):
- The Seven Storey Mountain
- Contemplative Prayer
- New Seeds of Contemplation
- No Man Is an Island
- Thoughts in Solitude
- The New Man
- The Wisdom of the Desert
- Life and Holiness
- Praying the Psalms
- The Sign of Jonas
- The Inner Experience: Notes on Contemplation
- Spiritual Direction and Meditation
- Conjectures of a Guilty Bystander
- Choosing to Love the World: On Contemplation
- Opening the Bible
- A Book of Hours
- Dialogues with Silence: Prayers & Drawings
- Survival or Prophecy?: The Correspondence of Jean Leclercq and Thomas Merton
- Thomas Merton: Essential Writings (Modern Spiritual Masters Series)
- Thomas Merton: Selected Essays, edited by Patrick F. O'Connell
- The Intimate Merton: His Life from His Journals
- Lent and Easter Wisdom from Thomas Merton: Daily Scripture and Prayers Together with Thomas Merton's Own Words
- The Asian Journal of Thomas Merton (New Directions Books)
- A Year with Thomas Merton: Daily Meditations from His Journals