The author of the book, Josh Kaufman, claims that in 20 hours of properly organized classes you can learn any business. The best proof of this is himself. A self-taught person who did not receive a classical business education, Josh is a successful entrepreneur, an outstanding business coach, and the founder and director of the Internet project PersonalMBA.com. The method he developed is universal. Do you want to learn a foreign language, write a novel, paint a portrait, open your own business, or learn the basics of flying an airplane? Spend just 20 hours on training and you will be amazed at the results.