Caitlín 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.