Book excerpt: An Official Harry Potter: Book of Spells is a complete lexicon of all the spells, curses, enchantments and magical abilities used within the magical world of Harry Potter. From the dreaded Avada Kedavra curse to the little known Jelly-Legs Jinx. From Harry's go-to Expelliarmus spell to Hermione's infamous usage of the Wingardium Leviosa charm. From the mind-wiping Oblivate charm to the Half-Blood Prince's violent Sectumsempra curse, you will learn about the pronunciation, the etymology, and the usage of these spells and many, many more throughout these hallowed pages. Over 200 spells will be covered in this tome of magical knowledge. From basic jinxes any first year could perform, to the most advanced branches of dark magic only found in the dimmest corners of the Restricted Section at Hogwarts School of Witchcraft and Wizardry. Be wary, young sorcerer. Be careful not to let Filch catch you...