Meritxell Martí is an artist, a composer, a musician, an award-winning author of more than 30 books, and an art and literature professor.  She is the author of La isla de las 160 diferencias and Me llamo Mozart, as well as many other books. Xavier Salomó is an award-winning illustrator of children's books. The two previously collaborated on 10 ciudades y 1 sueño, 10 viajes y 1 sueño, and Una noche bestial.