What is the name of J.K. Rowling’s 2001 companion book about Hogwarts students’ magical creatures?

J.K. Rowling’s 2001 companion book about magical creatures is Fantastic Beasts and Where to Find Them.

The book is presented as a Hogwarts textbook written by Newt Scamander. Its fictional author is a magizoologist, and Harry, Ron, and Hermione are listed as former owners of a copy. Rowling published it under the name Newt Scamander, linking the work to the wider wizarding world.

The book is a comic reference guide rather than a conventional narrative novel. It describes creatures such as dragons, hippogriffs, and Nifflers, using mock scholarly entries and humorous annotations.

The title later became the basis for a film series beginning in 2016. The films expand Newt Scamander into a central character, but the original 2001 publication is a short companion volume connected to the Harry Potter books.