What are /r/CatholicMysticism's favorite Products & Services?

From 3.5 billion Reddit comments

A few good primers:

• The Desert Fathers: Sayings of the Early Christian Monks
• The Sayings of the Desert Fathers: Alphabetical Collection
• The Wisdom of the Desert (T. Merton)
• The Way of the Heart (H. Nouwen)

There is also a bio of St. Anthony that I would recommend, but it's titles escapes me at the moment.