Guillaume Perreault is a trained graphic designer and mainly illustrates books for children and adolescents. As a comic book author, he made a name for himself with the humorous adventures of Bob the postman from space and received several awards for his comic series. His work, which is stylistically in the tradition of Ligne Claire, is often described as thoughtful and is full of characters with strong personalities. As an illustrator, he works for clients in the cultural and advertising sectors. Born in Rimouski, he now lives in Quebec, Canada.