After walking in the footsteps of his ancestors, Hubert Matiúwàa, author of this book, asks himself and explains: "Why call the Mè'phàà by the nickname of skin people?" And from that walk, the path his ancestors traveled, a path he traveled on a journey of learning and catharsis, he discovered that in Mexico during the pre-Hispanic era, the Mè'phàà were called Yopes or Tlapanecs; in Nicaragua, they were called Maribios, Sutiabas, or Sindio; and in Costa Rica, they were called Sebtevas. And in this, he discovered a constant: their rituals were related to skin. And it is then that the author sets out to gather from oral tradition and existing records the information that allows him to answer the question of why the Mè'phàà are called skin people and beings in the present. And he states: “From the epistemic horizons, oral pedagogy, ethics, poetics and politics, as well as dwelling and memory, the book... is a testimony written on the skin of two worlds, it is circumscribed in its time and translates thought to be a bridge of dialogue between the Mè’phàà writing/scar and Spanish, the hegemonic language.” He concludes: “The skin is the bond that unites pre-Hispanic time with the present, a codex that reveals the Mè’phàà feeling to understand its strength in the territory of La Montaña de Guerrero.”