Another book that may help those who are more business minded is Make Your Quilting Pay for Itself by Sylvia Ann Landman. The author takes you through a self analysis to help you determine if you have the right personality traits to start your own business. Then she takes you through each step of starting a buisness, complete with a checklist at the end of each chapter. There is a chapter on copyright.
The book is written clearly and is easy to understand. I recommend it for anyone thinking about making the leap from hobbyist to business person beacause it covers different avenues of making your quilting pay, including teaching, direct sales of your quilts, and publishing.