Volume 1 of an outstanding early series written by Charles Yerkow one of the best jiu jitsu and close combat experts active before, during, and after WW2 . Yerkow was a second dan ranked judoka, jiu-jitsu instructor, a hand to hand close combat instructor, and an expert in stick fighting. In 1942 Yerkow began writing a classic series of books that covered many aspects of judo, jiu jitsu, close combat, self defense, and stick fighting. The current volume is the first of a two volume set covering basic Judo techniques. With numerous photographs this is a must have for collectors and Judoka interested in the development of the art and it's military applications during this early time period.