Cabeza Ajena, by Andrés Cota Hiriart, is imposed as an adventure novel and a scientific story. It is also the story of an unavoidable attraction and of an intimate and, at the same time, revealing journey. Someone Else's Head is the proof that, as George Steiner thought, human beings relate and define themselves in their inevitable desire to know or to learn in any circunstances.

A group of friends experiment, by consuming various substances along a journey, in which curiosity and knowledge strengthen the relationships and friendship between Camilo, Boris, Genaro and Valenzuela. The appearance of a red-haired woman, the gentle paramedic, Nina, is also the sexual and love trigger that will take Camilo towards a deep examination of himself. Nina will join the group and her presence will be decisive in the vision that the friends have of the physical and psychological experience in the space of the altered regions. An unexpected and unusual ending also makes the reading of this novel to be a scientific reflection and a literary enigma.