Glyn Edwards was internationally acclaimed as one of the UK's finest mediums and teachers of spiritual and psychic science. At sixteen he joined a Benedictine community, which intensified mediumistic experiences he had had since a child and led him to leave the community after two years. He then started to work regularly as a platform medium in his early twenties - after doing his first public demonstration at nineteen - became a protégée of the world-renowned medium Gordon M Higginson, and founded the Gordon Higginson Fellowship. He was a certificate holder of the Spiritualists' National Union, was a regular and highly popular course tutor at the esteemed Arthur Findlay College in England for over three decades, worked at the Spiritualist Association of Great Britain, and ran workshops and demonstrated his mediumship throughout the UK and worldwide for more than forty years. For a while, Glyn undertook instruction from a renowned tantric yoga master, Sri Jammu Maharaj, as well as a teacher from the Bihar School of Yoga, Swami Dharmananda Saraswati Maharaj, who gave him the name Devadasa (meaning 'servant of God').

He co-authored two popular development manuals with close friend, GreenSpirit writer, designer and editor, and interfaith minister Santoshan (Stephen Wollaston), was featured in other books such as 'The Potential of Mediumship' anthology of his wisdom and 'Realms of Wondrous Gifts', wrote various articles for publications such as Psychic News, and released several audio recordings of his teachings. He was particularly known for the quality and depth of his wisdom and teaching, and his ability to demonstrate remarkably detailed evidence of human survival after death almost effortlessly in front of large audiences. People attended his courses and workshops just as much for his wisdom, charisma, and dynamic presence as a motivational speaker and extraordinary orator as they did for his reputation as an outstanding medium.

Books by and with Glyn include the anthology of his wisdom, 'The Potential of Mediumship: A Collection of Essential Teachings and Exercises' (released in 2012 and posthumously expanded in 2017 with two additional articles by and a more detailed biography about Glyn); 'The Spirit World in Plain English: Mediumistic and Spiritual Unfoldment' (2011 revised edition of 'Tune in to Your Spiritual Potential', released in 1999); and 'Spirit Gems: Essential Guidance for Spiritual, Mediumistic and Creative Unfold...