Excellent book, however the Yale site is only referring to a specific version, this very good book is anything but out of print:

(Non-aff link): http://www.amazon.com/The-Illusions-of-Entrepreneurship-eboo...

I particularly like the sections why people start their businesses (usually because they can't/don't like to work well with people above them), and what age most people are when they start them (in their 40s) and succeed.