Aikido and Dynamic Sphere - sorry forgot the author It explains the principles and philosophy of Aikdo pretty well as well as the skill.
Bubishi - patrick McCarthy - explains some interesting research about karate/te and the relation to chinese kung fu and culture. Has some interesting stuff about qigong and principles of styles etc.
dawood
Peace is not the product of terror or fear.
Peace is not the silence of cemeteries.
Peace is not the silent result of violent repression.
Peace is the generous, tranquil contribution of all to the good of all.
Peace is dynamism. Peace is generosity.
It is right and it is duty.