Followed by sam carpenter's work the system. I think if you're a programmer trying to make it as a business person those two books are the most invaluable.
Edit: about the how part.. Before reading and understanding these books I was always in a kind of firefighting mode. It was like a constant pain in the neck that something was somewhere needed me. Sure i was making money but I was not enjoying it and felt stressed all the time. Plus I wasn't scaling my business because of the constant need of attention from everything. Then I learned the systems thinking and it all started to change.. It was like I felt I had wasted 10 years of my life being stupid before. I'm telling you these two books can forever change your life both professionally and personally if you aren't already doing it.