Agatha Harkness shares her own spellbook, compiled over decades, to take readers on a journey through the supernatural world of Marvel, featuring history, spells, potions, and more! Narrated by the witch herself, Agatha has created this grimoire to teach budding witches how to harness their gifts-but as readers progress, Agatha's words of wisdom continue down a darker path ...With excerpts from other magical Marvel books-including the Darkhold-and notes from other magically powered characters like Doctor Strange and the Scarlet Witch, this book is at once a unique foray into the mystical mind of Agatha Harkness and an exploration of Marvel magic, making it the perfect guide for fans everywhere.