Prayer: Exploring Contemplative Prayer through Eastern and Western Spirituality

Passage to India: Abhishiktānanda and the Retrieval of the Supernatural in Roman Catholicism by Enrico Beltramini situates him in the context of mid-century French Catholicism and the retrieval of the supernatural (think Henri de Lubac). This is super academic. Swami Abhishiktananda: Essential Writings edited by Shirley du Boulay is a short collection of snippets of his writings. This is super pop level. In Search of Ultimate Understanding is a collection of his essays on Hindu-Christian thought. The editor's introduction is interesting, to say the least. Prayer is his most popular work and is a great introduction to contemplative prayer. This website can also point you to many more resources.