At least some content in this article is derived from information featured in Harry Potter: Hogwarts Mystery. Spoilers will be present within the article.
- "This book lists many of the great wizards of the twentieth century."
Harry Potter, Ron Weasley, and Hermione Granger consulted this book in the 1991-1992 school year while searching for information on Nicolas Flamel. They did not find any information about him in the book and later realised that, as Flamel was over six hundred years old, this and the other books they consulted were unlikely sources of information.