I haven’t read these books or heard the audio tapes they were based on, but I’ll bet they’re fascinating. Cistercian Publications has brought out multiple volumes of edited transcriptions of Thomas Merton’s conferences for Trappist novices. Several volumes deal exclusively or mostly with the Church Fathers: Cassian and the Fathers, An Introduction to Christian Mysticism: (from the Apostolic Fathers to the Council of Trent), Pre-Benedictine Monasticism, and The Rule of Saint Benedict. Merton could be maddening and often controversial. He certainly sinned grievously against his vows. But he was brilliant and gifted with remarkable insight. I hope to peruse these conferences some day. The original audio sources are for sale here.