"Marta and Maria: a novel about customs" is a work by the famous Spanish writer Armando Palacio Valdes, which tells about the lives of two very different sisters, Martha and Maria. Marta is hardworking, reserved and devoted to her duty, while Maria is cheerful, full of cheerfulness and independence. Their characters and views on life collide, causing conflicts and contradictions. The novel highlights social problems, religious considerations and family relationships, which makes it interesting for a wide range of readers. The author skillfully uses his talent to psychologically reveal the characters and create an atmosphere of emotional tension. "Martha and Mary" is a fascinating story that will leave a mark in the heart of everyone who decides to open its pages.