I've started a page with links to books that TA's would find interesting or useful. Let me know if you've got recommendations - right now there's a glaring lack of Max related books. I've been skipping over "How to do X in Max 2011" type titles so far since they get dated so quickly (I've got probably 200 lbs of utterly useless reference on versions of Maya and Max that wouldn't even run on Windows 7 stuffed into my basement). But I'm always interested to hear about useful reference stuff.
The TA Bookstore page