The Well-Fed Self-Publisher: How to Turn One Book into a Full-Time Living You can't get much better advice if you want to make a living as a writer.
The Well-Fed Writer: Back For Seconds A Second Helping Of "How-To" For Any Writer Dreaming of Great Bucks and Exceptional Quality of Life This is a companion to the first, not a rewrite. I got the package.
Purple Cow: Transform Your Business by Being Remarkable One of my favorite marketing books.
Secrets of a Freelance Writer, Third Edition: How to Make $100,000 a Year or More One of the classics in making a living as a copywriter.