Kodokan Judo is a great one. Another favorite is "Judo and Aikido" by Kenji Tomiki. The first 60 pages or so contain a great discussion on posture, walking, balance, etc. Not so much a discussion for the sport player but more for the martial artist/self defense. Good stuff. The problem with this book is it is long out of print and copies found on ebay are expensive.
I have been interested in the "Cannons of Judo" but due to the high cost of this out of print book I haven't purchased it just yet.
Enjoy and best of luck,
Mark J.