This article aims to analyze some syntax aspects observed in the book Os Sertões written by Euclides da Cunha. This work will focus the analysis on some points, such as: the sentence constructions, the punctuation, the verbal forms and the position of adjectives. Those aspects will receive sometimes a linguistic treatment; this means that such aspects will be explained using a theoretical contribution of some modern linguistic theories. We know, however, that the study of styles cannot be exhausted on the formal aspects of the composition.