"Fifty Per Cent Prophet" is a science fiction book by the famous author Randall Garrett. This book tells the story of a future where technology has become part of our daily lives. The main character, Gill, is a simple worker who acquires unusual bribes during a chance meeting with a visionary scientist. Together, they begin to use their knowledge to influence the future of humanity. "Fifty Per Cent Prophet" is an exciting adventure and philosophical story that leaves the reader thinking about the possibilities and limits of science and human development.