"Os Maias" is a novel written by the Portuguese author Eça de Queirós, published in 1888. It tells the story of the Maia family, focusing on the lives of Carlos da Maia and his love for Maria Eduarda. The novel explores themes of social class, love, and the decline of the Portuguese aristocracy during the 19th century. Set in Lisbon, the narrative captures the complexities of family relationships and societal expectations. Through rich character development and detailed descriptions, Eça de Queirós critiques the moral and cultural issues of his time, making "Os Maias" a significant work in Portuguese literature.