In these pages, the premise that Cervantes offers in his work, especially the second part of the Quijote, reading guidelines is assumed. Aware that his book broke narrative rules, the author makes the narrator and some personages intervene to explain the aesthetic direction their proposed project. These explanations in mouth of the narrator and characters are considered reflections on literature in the Quijote. So the analysis focuses on the mechanism that Cervantes used for such explanations: judgements issued by the protagonist, the other characters, the narrator and the author, from classical and Renaissance precepts. The discussions are moving to issues such as gender, criticism, translation, marketing books and plagiarism.