Understanding Karate Do is Johnston Karate's in-house student training manual and provided for free. In this book are articles on a karate history, Japanese terminology, physical conditioning, karate precepts and philosophy, general principles of movement, as well as lists of techniques, drills, and kata practiced in various karate styles. Lastly, the book details the hybrid style Mizuumi ryu Karate, formulated and taught at Johnston Karate.
 
http://www.johnstonkarate.com/2012/09/mizuumi.html