This article analyzes Fernando Vallejo´s El mensajero. Una biografia de Porfirio Barba Jacob, arguing that it stands for a posletrada or post-lettered position. In this case, the pos implies a position contradictory to the alienation by power of the modern writer as Angel Rama denounced in his seminal book The Lettered City. Vallejo reveals in his novel the strategies of what I call sensitive networks –intellectual, artists, writers who articulate their life, senses and bodies around the nomadic life of Barba Jacob–. This also implies a reading of the modernization of the writer in spaces of slow or very fragmented modernity, through non-canonical cultural strategies.