CG Toolkit releases The Character Learning Kit.
I wrote half of this book two years ago finally this book is out :
"cgtoolkit: The Art of 3D Toons";
I made all the rigging chapters and all the 8 rigs sold with.
Unfortunately this is only an ebook (the reason why it's a loooong
story) but you can see a sneak peak here : http://www.cgtoolkit.com/preview/Artof3dtoonsSneakPeak.pdf Enjoy!!