Dr. John Opsopaus has practiced magic and divination since the 1960s. His fiction has included a variety of hymns, poetry, and prose and his non-fiction works have featured rituals, translations, divination systems, and essays. His writings have been published in over thirty various magical and Neo-Pagan magazines including Traditions Magazine. Opsopaus designed the Pythagorean Tarot and wrote the comprehensive Guide to the Pythagorean Tarot (Llewellyn, 2001). He frequently presents workshops on Hellenic magic , Neo-paganism, Pythagorean theurgy, divination, and related topics.

Opsopaus has been involved in the magical and Neo-Pagan communities online for fifteen years, and his Biblioteca Arcana website has won numerous awards and is featured in several Internet guides. In the early 1990s he founded the Omphalos, a networking organization for Neo-Pagans in the Greek and Roman traditions which then became one of the first Internet resources especially for them. He is the webmaster of The Stele , the website for the Omphalos, which has won awards and been listed in the Circle Guide to Pagan Groups .

Opsopaus is both a coordinator of the Scholars Guild and Third Circle member of the Church of All Worlds. He is Arkhon of the Hellenic Kin of Ár nDraíocht Féin, and a member of Hellenion with the Pagan Education Network . Mr. Opsopaus is also member of the Grey Council and is the Dean of the Departments of Mathemagicks and Ceremonial Magick of the Grey School of Wizardry . He is listed under the “Who’s Who in the Wiccan Community” in Gerina Dunwich’s Wicca Source Book (Citadel, 1996).