"Indeterminate Sentence: What to Do with the Criminal Class" is an important literary work by the American writer Charles Dudley Warner. In this book, the author addresses a difficult question that is mysterious for many generations - how to deal with crime and its roots. Warner analyzes the social causes of crime and advocates the concept of education and rehabilitation of criminals, instead of harsh punishments. Due to its deep moral and philosophical content, the book has become a classic of criminology and social psychology. "Indefinite Sentence" leaves the reader with a question about the nature of crime and the need for a humane approach to the problem of crime.