Aikido and the dynamic sphere for sure is good for movement, as previously posted. Alot of the stuff you won't understand if you haven't been in the art for long, but don't worry, that's a good thing! You will subconciously assemilate alot of what's there anyway. And i think that it helped me tremendously to read this book before ever stepping foot on a mat. I reccomend going through it once every couple of months and then once a year, once every few years and so on as you progress in aikido. As you get older and wiser, new things in the book will jump out at you and you will take more and more from it. I get a serious case of the ah-ha's each time i read it!! To me, it's like watching a movie when you are very young... it's a great movie but you miss all the "adult humor" and situations. When you are older, alot of things have a much deeper meaning, and it makes more sense!
As for history and philosophy, i recomend "The Art of Peace" by Morihei Ueshiba, the arts founder.
For more philosophy and the spiritual aspects of aikido, check out "The essance of Aikido: Spiritual teachings of Morihei Ueshiba"
Good luck and have fun
Namaste
-Rob
