David Greene

John Boyd may be the most remarkable unsung hero in all of American military history. Some remember him as the greatest US fighter pilot ever - the man who, in simulated air-to-air combat, defeated every challenger in less than 40 seconds. Some recall him as the father of our country's most legendary fighter aircraft - the F-15 and F-16. Still, others think of Boyd as the most influential military theorist since Sun Tzu. They know only half the story.

If Chris Cooper has a superpower, it's the ability to make mistakes faster than anyone else. Fortunately, none have been fatal, and they can help other gym owners build happier lives. Chris brings a "big picture" perspective unmatched by anyone else in the industry. After thousands of hours spent one-on-one with gym owners, hundreds of blog posts, and more interviews than he can recall, Chris shares his best lessons in the second edition of Two-Brain Business.

After reading an article about a local farmer who had dedicated his life to growing giant pump­kins, Michalowicz realized the same process could apply to growing a business. He tested the Pumpkin Plan on his own company and transformed it into a remarkable, multimillion-dollar industry leader. First he did it for himself. Then for others. And now you.