A partir de la aparición de "Pedro Páramo", Rulfo escribe su segunda novela, "El gallo de oro". Ambientada en el mundo de las peleas de gallos y concebida como proyecto cinematográfico, probablemente se trate de la obra menos conocida del autor mexicano. No obstante ese desconocimiento, la valoración literaria está al mismo nivel que "Pedro Páramo" y "Llano en Llamas". From the appearance of "Pedro Páramo", Rulfo writes his second novel, "El gallo de oro". Set in the world of cockfighting and conceived as a film project, it is probably the lesser-known work of the Mexican author. Despite this ignorance, the literary valuation is at the same level as "Pedro Páramo" and "Llano en Llamas". On the occasion of the centenary of the birth of Juan Rulfo, RM publishes a special edition of "El gallo de oro" to which other stories that complement it are incorporated. The film script of "The secret formula", two early stories by Juan Rulfo: "Life is not very serious in its things" and "A piece of night", and also the one entitled "Castillo de Teayo". Also included is a letter from Rulfo to his wife, Clara Aparicio, in which Rulfo makes a harsh reflection on the nature of a heartless economic system. Finally, the reader will find nine texts that originally appeared in the collection of texts Los cuadernos de Juan Rulfo, an edition that is out of print.