Kenneth Oppel's Airborn won a Printz Honor Award, and the Canadian Governor General's Prize. Its sequel, Skybreaker, was a New York Times bestseller. His Silverwing trilogy has sold over 1 million copies worldwide, and has been adapted as an animated TV series and stage play. Movie rights for This Dark Endeavour have been bought by the producers of Twilight. Jon Klassen is a Canadian writer and illustrator of children's books, and an animator. He won both the American Caldecott Medal and the British Kate Greenaway Medal for children's book illustration, for his picture book This is Not My Hat. He is the first person to win both awards for the same work.