Place of publication transcribed from publisher's website.

Jordi Sierra i Fabra is a Spanish author of more than 300 books for adults and children who has been awarded the Spanish National Prize for Children's and Young Adult Literature and the Cervantes Chico prize for his work and contribution to the field of literature, among others. He is the founder of the Jordi Sierra i Fabra Foundation, which seeks to help adolescents in Barcelona and Medellin, Colombia, who wish to become writers. Josep Rodés is an illustrator who has collaborated with both children's book publishers and the press.