The product is a handbook titled "Secret Nidan Techniques of Hakkoryu Jujutsu" by author Dennis G. Palumbo. Published by Paladin Press, this paperback book is part of the Paladin Press Book series and is intended for adult audiences interested in martial arts and self-defense. The book is written in English and falls under the genre of sports and recreation, providing readers with detailed information on advanced techniques in the Hakkoryu Jujutsu martial art style.