José Luis (Pepe) Martínez Larraz studied art history and is a regular contributor to Arruequen. He has published the comic book 'La Estirpe de los Héroes' at Epicentro and has cooperated on 'AC 1.1.' with Javi García Ureña and Quique (Hua Kung Estudios). He has additionally contributed to Loka Magazine in Germany, and has done illustration, storyboard and advertising work. He is cover artist for the sciencefiction magazine Galaxia.