Inferno (Italian for "Hell") is the first part of Dante Alighieri's 14th-century epic poem Divine Comedy. It is followed by Purgatorio and Paradiso. It is an allegory telling of the journey of Dante through what is largely the medieval concept of Hell, guided by the Roman poet Virgil. In the poem, Hell is depicted as nine circles of suffering located within the Earth. Allegorically, the Divine Comedy represents the journey of the soul towards God, with the Inferno describing the recognition and rejection of sin.
A Book of Shadows is a book containing religious texts and instructions for magical rituals found within the Neopagan religion of Wicca. Originating within the Gardnerian tradition of the Craft, the first Book of Shadows was created by the pioneering Wiccan Gerald Gardner sometime in the late 1940s or early 1950s, and which he utilised first in his Bricket Wood coven and then in other covens which he founded in following decades. The concept of the Book of Shadows was then adopted by other Wiccan traditions, such as Alexandrianism and Mohsianism, and with the rise of books teaching people how to begin following Wicca in the 1970s onward, the idea of the Book of Shadows was then further propagated amongst solitary practitioners unconnected to earlier traditions.