I've been reading up on the business side of the industry recently... Have to share two titles - both very informative and worth the read. (BTW - seriously check out the legal difference between Library of Congress Copyright and WGA registration in "The Writer Got Screwed.") WOW, I'm glad I always went LOC!
Breakfast with Sharks
The Writer Got Screwed (But didn't have to)
This one's getting dated at this point, but still good for understanding the legalese...