This paper aims to propose an analysis of the book Montanha, wrote by Cyro dos Anjos in 1956, using for this intent some concepts of the comparative literature, historical novel, and Roman a Clef. Cyro in this political novel tries to extract the essence from the facts in a very turbulent moment of the Brazilian society and brings them together to a very complex and fragmented plot. It is possible to observe in the construction of the storyline, an attempt to create a plot that could represent an innovation from the previous novels published by the author and a political novel that was deeply influenced by cinematographic elements and by the American novels produced in the first decades of the 20th century. To execute this analysis we worked with the theoretical framework of Antonio Candido with the book Brigada Ligeira, Alfredo Bosi com História Concisa da Literatura Brasileira, Vera Márcia Milanesi em Cyro dos Anjos: Memória e História e Wander Melo Miranda em Cyro & Drummond.