"Momo" is a story about time and human relationships. Momo is a special girl who listens to people and makes them happy. The story talks about "time thieves," gray men who take time from people. They want people to only think about work and being busy. The book asks what is really important in life. It shows that being kind and having warm hearts are important. Since 1973, many people around the world have read this book. It helps people think about life and the problems in modern society.