Patronus spellbook

The Patronus spellbook was a book with instructions and information on the Patronus Charm. A copy of this book was owned by Remus Lupin.^[1]

Charms books
Defence Against the Dark Arts books
Harry Potter's possessions
2 more
Remus Lupin's possessions
Spellbooks

Behind the scenes[]

"What I want you to do is to go in there and bring back the spellbook containing the Patronus Charm."

— Lupin mentioning the book and what he wanted Harry to do^[src]

In the console version of the Prisoner of Azkaban video game, Remus Lupin uses it during his Anti-Dementor lesson with Harry Potter. He places the spellbook within a secret passageway accessed through the cupboard in Professor Cuthbert Binns's History of Magic classroom, and has a Boggart there also, knowing it would take the form of a Dementor, Harry's worst fear. Harry (the player) takes the book with him and learns how to cast the charm.^[1] This lesson is completely different to Lupin's Anti-Dementor lessons given in the novel.^[2]