Most Wiccan traditions treat their working ritual material as oathbound: a Book of Shadows exists, but it is copied by hand from initiator to initiate, never sold in a shop or printed for strangers. Zsuzsanna Budapest, founding the Susan B. Anthony Coven No. 1 in Los Angeles in 1971, made a different choice, and she made it on purpose.
Rather than restrict her coven's ritual calendar, its spellcraft and its founding theology to initiates, Budapest wrote it down and had her own coven publish it, first as The Feminist Book of Lights and Shadows in 1976, then expanded under the title The Holy Book of Women's Mysteries in 1980, revised again in 2003. Where Gardnerian and Alexandrian Wicca guard their liturgy as a mark of belonging earned through initiation, Budapest treated secrecy itself as part of what she was trying to leave behind: a structure she associated with the same gatekeeping, largely controlled by men, that feminist spirituality was founded to answer.
The result is a primary text in an unusual sense. It is not a scholarly account of Dianic Wicca written at a remove. It is the tradition's own founder, writing down what she built and choosing, deliberately, to let anyone read it. Three editions across twenty seven years suggest she never reconsidered that choice.