Allegedly retired serial entrepreneur, co–author of The Startup Owners Manual. Bob Dorf is likely the second most knowledgeable Customer Development expert on the planet, second only to its developer and Godfather, Steve Blank.  Together the two spent nearly two years conceiving, outlining, drafting, rewriting, and revising the global bestseller, The Startup Owner's Manual, now a business bestseller in the U.S. and many countries around the world.