The product is a hardcover textbook titled "The Science of Wrestling and the Art of Jiu Jitsu" by Earl Liederman. Published in 1925 in New York, this textbook focuses on the subjects of martial arts, physical education, and wrestling. Written in English, this textbook is a valuable resource for individuals interested in the techniques and principles of wrestling and jiu jitsu, providing a comprehensive insight into these disciplines from a historical perspective.