Roberto Aliago was born in Argamasilla de Alba (Ciudad Real) in 1976. He graduated in biology, and began his career in children's literature in 2005 with the book La oficina de objectos perdidos y encontrados (The Lost and Found Office). In 2008, in collaboration with Roger Olmos, he won the Premio Lazarillo de Ålbum Infantil Ilustrado for  El principe de los enredos (The Prince of Tangles). His works have been translated into several languages.