What is more intelligent than a genius, was he supremely superior? Several geniuses, pardi. In this case, they will not be too four to help Léonard overcome the riddle on page 13, mysteriously absent from his grimoire. Neither one, nor two, here is Léonard and his faithful Basile en route to Venice, in search of the descendants of the author of the grimoire, all geniuses as it should be....