Great book at a great price.
This is the best book available if you want to learn about serious prehistoric stone tool making. Its easy to read compared to a lot of scholarly references, and you can walk out , select a suitable stone and start knapping away; just follow the directions and it all starts happening! I used a piece of greenstone from my driveway and the flakes off it cut meat as easily as a sharp knife. It also arrived quickly and was much cheaper than the University bookshop price.