Gosei Yamaguchi wrote this book in the 1970's. Soon after it was discontinued, but its approach and way of being written is second to none as it not just teaches the techniques of Goju Ryu Karate, but it also shows a unique way of teaching the timing in the kata's taught for the beginners of this style. This book is one of the original books from the vast library of Ohara, Black Belt and is a must have for those who want to learn the original way of doing these basic katas of Gogen 'The Cat' Yamaguchi.