Jon Klassen is a Canadian writer and illustrator of children's books. He is best known for his minimalist and evocative illustration style. Klassen has won several prestigious awards for his work, including the Caldecott Medal for his book "This Is Not My Hat," which is known for its dark humor and clever use of visual storytelling. In addition to his authorial projects, he has also worked as an illustrator for other authors' works and contributed to animation projects. His books often feature animals as characters and explore themes of adventure, morality, and the unexpected outcomes of characters' decisions.