Attached Link: http://www.saveloomis.org/

In a thread some hours/days ago, I dug out the works of Andrew Loomis. They're not at all 3D-related, but give a real insight about composition and specially the treatment of the human figure. They're worth to take a look. The website linked as a couple of his books in PDF format (and it's legal to download them). Hope this helps. S.