Question: Fantastic Beasts and Where to Find Them is written about a topic in the Harry Potter universe, where is this topic derived from?
Context: The untitled "Fantastic Beasts" sequel is an upcoming fantasy drama film produced by Heyday Films and distributed by Warner Bros.  Pictures.  It is the sequel to the 2016 film "Fantastic Beasts and Where to Find Them", based on J. K. Rowling's book of the same name.  It will serve as the second film instalment in the "Fantastic Beasts" series and the tenth overall in J. K. Rowling's Wizarding World, the franchise that began with the "Harry Potter" series.  The film is directed by David Yates, with a script by Rowling, and features an ensemble cast that includes Eddie Redmayne, Katherine Waterston, Dan Fogler, Alison Sudol, Ezra Miller, Johnny Depp, Jude Law, Zoë Kravitz, and 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.  The original version purports to be Harry Potter's copy of the textbook of the same name mentioned in "Harry Potter and the Philosopher's Stone" (or "Harry Potter and the Sorcerer's Stone" in the US), the first novel of the "Harry Potter" series.  It includes several notes inside it supposedly handwritten by Harry, Ron Weasley, and Hermione Granger, detailing their own experiences with some of the beasts described, and including in-jokes relating to the original series. Magical creatures are a colourful aspect of the fictional wizarding world contained in the "Harry Potter" series by J. K. Rowling.  Throughout the seven books of the series, Harry and his friends come across many of these creatures on their adventures, as well as in the Care of Magical Creatures class at Hogwarts.  Rowling has also written "Fantastic Beasts and Where to Find Them", a guide to the magical beasts found in the series.  Many of these are derived from folklore, primarily Greek mythology, but also British and Scandinavian folklore.  Many of the legends surrounding mythical creatures are also incorporated in the books.  "Children ... know that I didn't invent unicorns, but I've had to explain frequently that I didn't actually invent hippogriffs," Rowling told Stephen Fry in an interview for BBC Radio 4.  "When I do use a creature that I know is a mythological entity, I like to find out as much as I can about it.  I might not use it, but to make it as consistent as I feel is good for my plot." The James Potter series is an unofficial sequel-series of J.K. Rowling's Harry Potter universe, written by G. Norman Lippert.  The novel series centers around the character of James Sirius Potter, Harry Potter's son, a character who makes a fleeting appearance in the novel "Harry Potter and the Deathly Hallows".  The series starts with his first year at Hogwarts, set one year before the end of the Harry Potter series. Fantastic Beasts and Where to Find Them is a 2016 fantasy film directed by David Yates.  It is a prequel to the "Harry Potter" film series, and it was produced and written by J. K. Rowling in her screenwriting debut, and inspired by her 2001 book of the same name.  The film stars Eddie Redmayne as Newt Scamander, with Katherine Waterston, Dan Fogler, Alison Sudol, Ezra Miller, Samantha Morton, Jon Voight, Carmen Ejogo, Ron Perlman and Colin Farrell in supporting roles.  It is the first installment in the "Fantastic Beasts" series, and the ninth overall in J. K. Rowling's Wizarding World, the franchise that began with the "Harry Potter" films. Jaana Marjatta Kapari-Jatta (born 19 May 1955, in Turku) is a Finnish translator of fiction, best known for her Finnish-language renderings of the "Harry Potter" novels and supplementary books by J. K. Rowling, including "Harry Potter and the Cursed Child".  In her translations of "Fantastic Beasts and Where to Find Them" and "Quidditch Through the Ages", she used the pseudonym “Kurvaa Aka (Whoss Gue)”. Harry Potter is a British-American film series based on the "Harry Potter" novels by author J. K. Rowling.  The series is distributed by Warner Bros. and consists of eight fantasy films, beginning with "Harry Potter and the Philosopher's Stone" (2001) and culminating with "Harry Potter and the Deathly Hallows – Part 2" (2011).  A spin-off prequel series will consist of five films, starting with "Fantastic Beasts and Where to Find Them" (2016).  The "Fantastic Beasts" films mark the beginning of a shared media franchise known as J. K. Rowling's Wizarding World. Lego Harry Potter: Years 1–4 is a Lego-themed action-adventure video game developed by Traveller's Tales and published by Warner Bros.  The game is based on the Lego Harry Potter line and its storyline covers the first four films in the "Harry Potter" series: "Harry Potter and the Sorcerer's Stone", "Harry Potter and the Chamber of Secrets", "Harry Potter and the Prisoner of Azkaban", and "Harry Potter and the Goblet of Fire".  The game is available on the Wii, Xbox 360, PlayStation 3, Nintendo DS, PlayStation Portable, Microsoft Windows, OS X, iOS and Android.  The OS X version of the game was released on 22 February 2011 by Feral Interactive.  The game was released for the PlayStation 4 on October 21, 2016, as part of the "Lego Harry Potter Collection", which bundles the game with its sequel, "". Lego "Harry Potter" is a Lego theme based on the films of the "Harry Potter" series.  Lego models of important scenes, vehicles and characters were made for the first six films and all the books released.  The first sets appeared in 2001, to coincide with the release of the first film "Harry Potter and the Philosopher's Stone" (Harry Potter and the Sorcerer's Stone in the United States).  Subsequent sets were released alongside the new films, until Harry Potter and the Order of the Phoenix.  The line then went dormant for three years.  It is unknown if the theme will again be revived to coincide with future installations in the Harry Potter franchise, such as the film Fantastic Beasts and Where to Find Them. Lego Harry Potter: Years 5–7 is a Lego-themed action-adventure video game developed by Traveller's Tales and published by Warner Bros.  Interactive Entertainment.  Released on 11 November 2011 in North America and 18 November in Europe, the game is based on the Lego Harry Potter line and is based on the final three books and four films in the "Harry Potter" series: "Harry Potter and the Order of the Phoenix", "Harry Potter and the Half-Blood Prince", "Harry Potter and the Deathly Hallows – Part 1", and "Harry Potter and the Deathly Hallows – Part 2".  The game was released for the PlayStation 3, Xbox 360, PlayStation Portable, PlayStation Vita, Wii, Nintendo DS, Nintendo 3DS, Microsoft Windows, iOS and Android.  The first trailer of three trailers was released 6 October 2011, and the demo was released on 1 November.  The game was released on Steam on 5 January 2012.  The OS X version of the game was released by Feral Interactive on 7 March 2012.  The game was released for the PlayStation 4 on October 21, 2016, as part of the "Lego Harry Potter Collection", which bundles the game with its predecessor, "".
Answer: derived from folklore, primarily Greek mythology, but also British and Scandinavian folklore