At least some content in this article is derived from information featured in: Harry Potter: Hogwarts Mystery & Harry Potter: Puzzles & Spells & Fantastic Beasts: The Secrets of Dumbledore.
Hermione Granger used the book for this purpose, furiously rereading the book in order to make sure she had the material down before the exam. The day before the theoretical Charms O.W.L., she asked Harry Potter to quiz her; he did so, but soon regretted his decision when he found that Hermione frantically retrieved the book after every quiz question in order to check that her answer was completely correct. She eventually hit him on the nose with the book's sharp edge.
- Harry Potter and the Order of the Phoenix (First appearance)
- Harry Potter and the Order of the Phoenix (video game)
- Fantastic Beasts: The Secrets of Dumbledore
- Harry Potter: Hogwarts Mystery (Mentioned only)
- Harry Potter: Wizards Unite (Mentioned only)
- Harry Potter: Puzzles & Spells (Mentioned only)