This book was one of the hundreds of books that the Room of Requirement supplied for Dumbledore's Army in their first gathering there. Seeing this and other such books helped convince Hermione Granger that she and the others were doing the right thing by participating in the group.
- Harry Potter and the Order of the Phoenix (First appearance)
Notes and references
- Harry Potter and the Order of the Phoenix, Chapter 18 (Dumbledore's Army)