This article is not part of the Harry Potter universe. This article covers a subject that is part of the real world, and thus should not be taken as a part of the Harry Potter universe.
Giles Greenfield is the illustrator who created the cover for the UK and Australian Bloomsbury editions of Harry Potter and the Goblet of Fire. He was supposed to create the cover for the fifth book, but didn't finish it due to his daughter Sasha being diagnosed with a terminal genetic illness. He also writes and illustrates children's books.