The five black belt instructor's books that many of you have in your possession are of extremely great value. They were compiled primarily by my instructor, Master Carl L. Lorenzen. The first book starts with some of the forms that were taught earlier on. The first 12 of the Basic 45 were written by Carl Lorenzen, and 13 - 45 were written by Russell Williams. The 200 attack techniques were also written by Russell Williams, and were included illustrating early lessons, which I am not exactly sure of their origin.
Books 2 - 4 were written primarily by Carl Lorenzen, and included forms along with Fut Ga techniques that were taught by Jimmy H. Woo to him in his garage between the years of 1977 and 1984. The forms in each book are directly related to the Fut Ga lessons in the same book. Jimmy H. Woo was working through different sections of his Chinese monastery books, and was teaching concepts and series sets, which were cohesive in the principles applied.
Jimmy H. Woo told Carl Lorenzen that the 5 books cover about 40 - 50 % of what was in his Chinese monastery books. The earlier lessons that Jimmy H. Woo taught were other areas within the Chinese books. If one pays attention to the language used in Kung-Fu San Soo in regards to the principle of motion, one can easily see how all the lessons are to be combined, and used together to effectively use the art.
If anyone doubts that the Chinese books exist my instructor, Master Carl L. Lorenzen, told me that he personally saw them and looked inside at the Chinese characters on the pages. I trust his word, and the fact that the structure of the art supports this reality.
The early lessons, such as: Ah Soo, Top Ga, Nam Pai, and others can also be used together with the Fut Ga and other attack lessons.
Old San Soo and content from the 5 books should be looked at as one unit coming from one source, and seen as one whole system that fits together like a language does; using all the elements of the given language.
Understand that the 5 books written by Carl Lorenzen are just part of Kung-Fu San Soo, but they are a significant portion.