The Books Recommended in this post thus far...

All You Need to Know About the Music Business - Don Passman
Musician's Business and Legal Guide (more indepth - read Passman first.) - Mark Halloran

Hit Men
The Real Deal - Daylle Deanna Schwartz

There are a few more I have in my home library and I will get the titles tonight and the exact Author/Publisher to make those easy to find too