Salvador Macip and Sebastià Roig are lifelong friends, have collaborated on several occasions and they definitely have fun doing so. They share the same passion for scfi, the fantasy world and the comic published between the thirties and the sixties. They have a similar musical taste and they often share readings. Their understanding is complete and the best example are the works they write toghether. How do they do that? Who puts the adjectives and who builds the dialogues? This is a very well kept secret that we don't know if one day they will share with their loyal readers. So far, we have their books.