Pilar Serrano Burgos is a teacher and is passionate about education children. She earned a degree in Primary Education and Early Childhood Education and did additional training in Emotional Intelligence, making her an expert on the topic. She is also the author of Si mamá dice blanco, papá dice negro and El mejor lugar del mundo. Mar Ferrero studied Fine Arts in Madrid and has since worked as an illustrator. She has worked with the press, but is primarily devoted to illustrating children's books. She has participated in many exhibitions and has collaborated with a variety of publishers in Spain.