Xue Sheng
All weight is underside
The Principles of Aikido by Mitsugi Saotome
Thanks for the reminder, I have been meaning to pick up that book by Mitsugi Saotome Let me know what you think
Another good Aikido book, if you have not already read it, is "Book of Ki: Co-Ordinating Mind and Body in Daily Life by Koichi Tohei"