Fantastic Beasts and Where to Find Them is written about a topic in the Harry Potter universe, where is this topic derived from?
Fantastic Beasts and Where to Find Them: Fantastic Beasts and Where to Find Them is a 2001 book written by British author J. K. Rowling (under the pen name of the fictitious author Newt Scamander) about the magical creatures in the "Harry Potter" universe. Magical creatures in Harry Potter:  Many of these are derived from folklore, primarily Greek mythology, but also British and Scandinavian folklore.
derived from folklore, primarily Greek mythology, but also British and Scandinavian folklore