Much of this book is from personal experience and "The Book of Five Rings" by Miyamoto Musashi, which is a text book written by a 17th century Samurai and Duelist.
I have also borrowed a few training techniques from the SCA (Society for Creative Anachronisims) Fighters Guide.
In my six years as an active combatant in GOA I have come across many different styles so this is by all means NOT the definitive text on the art of combat. It is only a guide to my experiences and beliefs.
Take what you want from it and learn what you can.
A good fighter NEVER assumes he can not be taught anything new.