Question: What 2001 book written by British author J. K. Rowling about the magical creatures in the Harry Potter universe, which are a colourful aspect of the fictional wizarding world?
Sentence (from "Magical creatures in Harry Potter"): "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.
Relevant evidence: No