Ellen Evert Hopman has been a teacher of herbalism since 1983 and is a professional member of the American Herbalists Guild. A member of the Grey Council of Mages and Sages and a former professor at the Grey School of Wizardry, she has presented at schools and workshops across the United States and Europe. A Druidic initiate since 1984, she is the current Archdruid of Tribe of the Oak (Tuatha na Dara), an international Druid Order, a founding member of The Order of the White Oak (Ord Na Darach Gile), a Bard of the Gorsedd of Caer Abiri, and a Druidess of the Druid Clan of Dana. A former vice president of The Henge of Keltria, she is the author of The Sacred Herbs of Spring; The Sacred Herbs of Samhain; Secret Medicines from Your Garden; The Real Witches of New England; Scottish Herbs and Fairy Lore; A Druid's Herbal of Sacred Tree Medicine; A Druid’s Herbal for the Sacred Earth Year; Walking the World in Wonder – a Children’s Herbal; Being a Pagan; Tree Medicine, Tree Magic; and the Druid trilogy of novels: Priestess of the Forest, The Druid Isle and Priestess of the Fire Temple. She lives in Massachusetts.