I got a chunk of cash when I switched jobs -- unused vacation time turns into money. I've proceeded to turn some of that into books. Lots of books.
Now I just need to stop turning all my sleep-time into reading-time :-)
But Rogers and Peck do a great Atlas of Human Anatomy. It's meant for artists, but I really wish I'd had it in my massage class. It wins. It should do a lot for my sculpting class.