"Momo" is a children's fantasy novel written by Michael Ende and published in 1973. The story follows a young orphan girl named Momo who lives in a ruined amphitheater on the outskirts of a city. Momo has a special ability to listen to people and help them solve their problems, and she spends her days helping her friends and neighbors. One day, Momo discovers that a group of men known as the Men in Grey are stealing people's time by convincing them to save it in special banks. As more and more people become caught up in saving time, they become anxious and unhappy, losing the ability to enjoy life. Momo sets out to stop the Men in Grey and restore people's lost time, with the help of her friends and the mysterious creature known as the Professor. The novel is known for its themes of time, imagination, and the importance of human connection. It has been adapted into a film, a stage play, and a musical, and has been translated into more than 40 languages. Ende's unique writing style and imaginative world-building have made "Momo" a beloved classic of children's literature.