Many books have been used to write the Diamond Meditations Unveiled.
Here is a short list :
Bailey, Alice. Letters on Occult Meditation. New York: Lucifer Publishing Companies, 1922.
Bailey, Alice. The Light of the Soul: Paraphrase of the Yoga Sutras of Pantanjali. New York: Lucis Publishing Companies, 1927.
Bailey, Alice, and Djwal Khul. A Treatise on White Magic: The way of the disciple. New York: Lucis Publishing Companies, 1934.
Bailey, Alice, and Djwal Khul. Discipleship in the New Age Vol II (Vol. 2). New York: Lucis Publishing Companies, 1955.
Brennan, Barbara Ann. Hands of Light: A guide to healing through the human energy field. New York: Random House, 1988.
Brennan, Barbara Ann. Core Light Healing: My Personal Journey and Advanced Healing Concepts for Creating the Life You Long to Live. Carlsbad, California: Hay House, 2017.
Chaney, Earlyne and Robert. Astara’s Book of Life, 1st Degree, Lesson 2: Meditation and the Anatomy of Consciousness. Upland, CA:Astara, 1965.
Chaney, Earlyne and Robert. Astara’s Book of Life, 2nd Degree, Lesson 7: Queen Pituitary and Her Falllen Lord Pineal. Upland, CA:Astara, 1966.
Haich, Elizabeth. (2000). Initiation. Santa Fe, NM: Aurora Press, 2000.
Leadbeater, C. W. (1927). The Chakras. Wheaton, IL: The Theosophical Publishing House, 1927.
Lockhart, Maureen. The Subtle Energy Body: The Complete Guide. New York: Simon and Schuster, 2010.
Richardson, Wally and Jenny, and Lenore Huett. The Spiritual Value of Gem Stones. Marina Del Rey, CA: DeVorss & Co., 1980.
Sui, Choa Kok. Miracles through Pranic Healing: Practical Manual on Energy Healing. Energetic Solutions, Inc., 1987.
Sui, Choa Kok. The Spiritual Essence of Man: The Chakras and the Inverted Tree of Life. Chino, CA: Institute for Inner Studies, 2003.