Caitlin Matthews is internationally renowned for her research into the Celtic and ancestral traditions. She is the author of 36 books, including The Celtic Tradition, The Encyclopedia of Celtic Wisdom, and Sophia: Goddess of Wisdom. She is co-founder of the Foundation for Inspirational and Oracular Studies, which is dedicated to oral, shamanic, and sacred arts. Caitlin Matthews has a shamanic practice in Oxford, England, and teaches worldwide.
John Matthews has authored over 60 books, including The Grail: Quest for Eternal Life and The Encyclopaedia of Celtic Wisdom. A foremost expert in the Arthurian legends and esoteric wisdom of the Celtic traditions, he teaches and lectures around the world. He resides with his wife, Caitlin, in Oxford, England.