It's a cheering and inspirational book for aspiring indie businesspeople. The author was ahead of her time with a lot of her ideas about self-employment, including her idea about setting up multiple streams of income. What I especially like about the book is her emphasis on not getting overwhelmed by instead focusing on small and achievable goals. For an idea of the author's philosophy, check out this recent blog post of hers about her concept called The $100 Hour.
If you're thinking of shifting more into working for yourself and/or want to expand your existing independently-run business, check out Barbara's book. It's a great source of encouragement for solo-entrepreneurs.
Speaking of solo entrepreneurs, check out this interview I did with Part-Time Ted, a guy who has built a career on developing content-rich websites.