One thing many are unaware of is that Bruce published a companion essay. Whereas the "Chinese Gung Fu" book sold for $5.00, the essay sold for $2.00.
The essay is 11 pages including the cover in an 8.5" x 11" size. It is held together by two staples at the top. The cover is a more yellowish color than the beige of the actual book. The essay includes basically the same photos and diagrams as the poster just presented in a different format.