Éric Sanvoisin was born in Valence, France in 1961. Father of seven children, he works in a library. Thierry Martin was a French illustrator, known under his pen name Martin Matje. Born in Paris, Matje was originally educated as an engineer. Matje was the author of several children’s books published by Nathan, Gallimard and Nathan. Also a press illustrator, his work appeared inLibération, Marie-Claire, Lire, Le Monde de l’Education, Les Échos, andThe New Yorker.