This comprehensive book is for all martial arts enthusiasts, beginners confirmed, to discover or deepen key techniques, chokes, passages guards, clearances, etc ... all classified by levels depending on the colors of the belts. Very well illustrated, each photo is useful and in color; there are close-ups of important technical details. About 40 pages on the history of jjb for those interested. I recommend supplemental "the fight by submission" by the same author Gracie that addresses another aspect of the fight to the ground without the Gi (kimono).