respectfully, there are hundreds of books out there that have correct information in them. It isn't a matter of "no information", it's a matter of knowing how to understand the information and how to actually feel the movement when it's correct.
True, I could parrot another book on jujutsu and aikido and probably make some money off it, but martial arts have never been about money to me. It's about the technique and having it in my repetoire and being able to pass it on to someone else.
The only useful thing I've found in books have been kata diagrams for karate that showed the correct embusen, points of kiai, etc. and a few of the aikido books that showed correct exercises. It's not an "information" problem, it's a "learning" problem... and as my buddy Eyrie has said, it's all "hidden in plain sight".
I read and study martial arts at least as many hours out of the dojo as I do in practice, and have for years. That's how I know what the latest panacea is for teaching and how somebody's trying to "spin" the information to look like they discovered it. I have no qualms about calling their hand on it...
First, unless your body works a different way from everybody else in the world, the body mechanics of ANY art are going to be the same. Your arms and legs move from the same points, your hips and backbone work the same way, and your parts are all located in the same places... so what makes one art different from the other?
To answer that question, I teach students that "karate is a hitting art", "Judo is a grappling and throwing art, as is jujutsu", Aikido is a blending art based on swordsmanship and jujutsu. From that, you should understand that some arts are force delivery, others use body mechanics to manipulate the body, and others use blending techniques to "accompany" the attacker's body in creating a technique.
Now, the rest of my information is learned in a dojo setting and with any kind of attack you want to bring with you... and some of my approaches to "self defense" might fool you... Like our buddy Rob, there are a lot of preconceptions out there, and it's a real surprise when they suddenly are attacked back with hitting techniques in aikido or judo or jujutsu... first reactions... "Oh, but that's not (insert art of your choice)"...
O.K.... so sue me for keeping you alive but not using your preconceived idea of what (art of choice) is...
Remember, only sports have rules and referees... and everything else is up for grabs... so when you start comparing things with "everything else" as Rob does, it's clear that he has no concept of what actually goes on in the real world. I've trained with some of the world's best during years when all this "hollywood" $*** was developing into what are "X-treme martial arts
" and people were being purposely misled by others who had no knowledge of the finer points of martial training, or any interest in keeping the principles of martial arts. They were only interested in making money... so they sold out the arts for the bucks, and we have the situation now where everyone's arguing over which flea owns the dog, rather than focusing on good training and good technique.
Andy, I guess I'm addressing Rob's arguments and your question at the same time, but with that situation in place, do you really think another book of instructions is going to make any significant difference? The information's out there... it's a matter of training it and understanding in your body how it works and how it's applied.
I was once introduced as "a walking encyclopedia of martial arts" at the Okinawan Karate seminar, and while I would disagree, I think that it's what we need to strive to become... but it's more than that... it's "information in action"... which is the true measure of "mastery".