Fran Nuño was born in Bilbao in 1973 but has lived in Seville since he was ten months old. He is a writer, cultural activist and bookseller-publisher. He has written more than fifty books, almost all of which are for children and young adults.

Based on an idea by editor Gonçal López-Pampló, the illustrator Fran Parreño has created this album about democracy and the need to protect it.

Fran Pintadera (born Las Palmas de Gran Canaria, 1982). He has a degree in educational psychology, a diploma in social education and degree in social integration. He is a storyteller, social theatre director and children's book author. He has taken part in major story telling festivals in Spain.

Fran Toro (Badalona, 1977) is a history teacher and writer and these two activities are as naturally combined as different coloured pieces of plasticine in the hand of a child.

Francesc Serés: (Saidí, 1972) is the author of The Guts of the Earth (2000), The Trunkless Tree (2001) and A Lead Tongue (2002). These books were gathered in the trilogy of Manures and Marbles (2003), which was awarded the National Literature Prize in 2007.