The author : Bob Dorf

Bob Dorf is a serial entrepreneur, founding his first success at age 22 and, since then, six more--"two homeruns, two base hits, and three great tax losses," as he puts it. He's advised and/or invested in a score more startups since. Dorf is often called the "midwife of Customer Development," having critiqued early drafts of The Four Steps to the Epiphany; he and Steve have been friends and colleagues ever since.

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