The Unofficial Ultimate Harry Potter Spellbook is a beautiful, elegantly designed reference that details all of the known spells cast in the Harry Potter films, books, video games and card games, as well as official Harry Potter spinoffs, such as Fantastic Beasts and Where to Find Them.

Each spell is given its own entry including spell name, pronunciation details, a description of the spell effect, spell casting methods, wand movements, hand movements and vocalizations, plus primary sources in which the spell was used. Readers will also find trivia related to each spell, such as who it was used against, what the outcome was, or what a spell's unusual history might be.