Meritxell Marti is a writer and professor of art and literature at the Open University of Catalonia. He received his bachelors and PhD in humanities from the Independent University of Barcelona. He has published over thirty children's books. Xavier Salomó is an award-winning illustrator of children’s books. They previously collaborated on 10 ciudades y 1 sueño, 10 viajes y un sueño, and Una noche bestial.