(Continued- for some reason my posting window acts up when I post more than a few lines)
"Martial Arts Game" by Rodney King
This book as a different program and probably not something for most instructors. He is opposed to teaching for sport, tradition, or self-defense and instead advocates teaching martial arts for life coaching. He says that most adults don't care about belts, trophies, competition, fighting, or self-defense, and that few people really ever need to defend themselves. Basically this is being something like a personal trainer for small classes (about 6 students a class) and helping them achieve their personal goals in MA. You don't just teach a small class, each student gets personal attention, and for this personal attention he says to charge about $300.00/mo. or so. Basically it would be the same thing as when people sign up for semi-private fitness classes.
There are not many books on the topic, and these three are on the entire subject of running a school, not just marketing. You could probably fit all the books on MA teaching, marketing, running a school, and related topics on half a shelf.
Graden has two other books, Turtle Press has a new one, and Jerry Beasly also has one. There is also an E-book by Michael Massie titled "Small Dojo Big Profits."