sentences:  North American Gardnerians of the Long Island line allow covens to add rituals and teachings to the book, but nothing may be removed.There sometimes exists two Books of Shadows kept by more traditional Wiccans, one being a coven book of core rituals and practises which remains unchanged and from which new initiates copy, and the second, intended for personal use, which differs from witch to witch and contains magical material collected by the initiate, such as astrology, herbal lore, and information regarding divination.After Gardner's death, his rival, Charles Cardell, published much of the material from the Gardnerian Book of Shadows.