What is the title of J.K. Rowling’s 2001 charity companion book presented as a Hogwarts textbook?

J.K. Rowling’s 2001 charity companion book presented as a Hogwarts textbook is Fantastic Beasts and Where to Find Them.

The book is credited to the fictional author Newt Scamander, a magizoologist in the Harry Potter universe. Rowling wrote the text as a reproduction of a Hogwarts schoolbook, complete with notes attributed to Harry, Ron, and Hermione. Its entries describe magical creatures and their classifications.

Bloomsbury published the original edition in 2001, with proceeds supporting Comic Relief. Rowling later expanded the concept into the 2016 film Fantastic Beasts and Where to Find Them, where Newt becomes the central character.

The companion book is often confused with Quidditch Through the Ages, another fictional Hogwarts textbook published for charity in the same year. The two books have different fictional authors and subjects: creatures in Fantastic Beasts, and the history and rules of Quidditch in the other.