Fantastic Beasts is one of Harry Potter's textbooks at Hogwarts, which first appears in Harry Potter and the Sorcerer's Stone (the first book of the series). Written by Newt Scamander, it's a guide for magizoology — the study of magical creatures — and educates young minds about 75 different species of creatures, all based on the observations of the author himself on his travels. It's required reading for all first-year Hogwarts students.
Although the book was a textbook and not Newt's story, as the movie is, J.K. Rowling will be releasing the Fantastic Beasts and Where to Find Them screenplay as a book in November. She's also provided several short stories on Pottermore about magic in North America.
