Knife Mechanisms just for the fun of it. I wrote this book for many reasons but for the most part for something we can all have fun with. I always have been curious how folding knives work. But it was too much work finding out. This curiosity became intense when I tried to make a folding knife. There was either very little information out there or it was difficult to get. A lot of people looked for an inclusive book but there was none. And now I know why. There is a lot work in compiling a book on knife mechanisms. I am enjoying most of it.