The Book of Shadows is the magical tome of the Warren Line of Witches. It is the most powerful and coveted of the Books of Shadows in existence and is over three hundred years old. The Book has been passed down every generation ever since it was created by Melinda Warren in the 17th century. Besides information about the craft, the Book contains many entries on several beings from the magical community, including demons, warlocks and other evil beings. It also contains many spells and potion recipes, most of which were written by Penny Halliwell.