María José Ferrada has a degree in Social Communication from the Universidad Diego Portales in Chile. She studied Applied Linguistics in Translation at the Universidad de Santiago de Chile and has a masters in Asian Studies from the Universidad de Barcelona. Her previous works include El idioma secreto (The Secret Language), which won the Orihuela Prize.

Mariana Alcántara Pedraza was born in Mexico City in 1991. She has won the 29th Illustrator's Catalog at the 2019 Encuentro Valladolid Ilustrado International Children's and Young Adult Book Fair in Spain, and 3rd Prize at the Sharjah Children's Reading Festival in 2018. Her work was included in The White Ravens Catalogue in 2019.