This is probably the only book in print which explains in detail the real reasons, history and mechanisms behind how Poison Hand techniques work. However, this book does not merely give a history lesson. It will actually show how to do these techniques yourself!
There will be no supposed rumors of techniques that are alluded to but never shown. There is no allusion to magic which will bar you from learning the actual techniques.
The actual techniques of Poison Hands are explained in detail, to the point where you will be able to learn to do these techniques in a reasonably short period of time