Its accuracy is disputed by some, while others consider it a vital resource for studying and understanding Italian witch folklore of the 19th century. What is certain is that this 1899 classic has become a foundational document of modern Wicca and neopaganism. Leland claimed his "witch informant," a fortune-teller named Maddalena, supplied him with the secret writings that he translated and combined with his research on Italian pagan tradition to create a gospel of pagan belief and practice.

Here, in the story of the goddess Aradia, who came to Earth to champion oppressed peasants in their...