This should probably go in the book review section but I thought that it might be more relevant here.
Ryo Yoshida is a Japanese ball-jointed doll maker and one of the founders of Doll Space Pygmalion, a place that offers classes on methods of constructing these dolls. A couple of years ago the book Yoshida Style: Ball Jointed Doll Making Guide was published by Hobby Japan. This book is incredible; a step by step process that covers every aspect of the making of these amazing dolls. The book is all in Japanese but the photos provide a pretty good idea into what is going on.
The book is usually listed on ebay and, as far as I know, is always available here:
http://www.verycoolthings.com/vct/Neo_getpage.cgi?page=itemtoy&itemID=14742Those that want or need more information can obtain a translation of the text here:
http://www.potbellybears.com/YOSHIDA%20translation%20from%20Den%20of%20Angels.doc