Steve Blank is a retired serial entrepreneur-turned-educator who has changed how startups are built and how entrepreneurship is taught. He created the Customer Development methodology that launched the lean startup movement, and wrote about the process in his first book, The Four Steps to the Epiphany. His second book, The Startup Owner's Manual, is a step-by-step guide to building a successful company. Blank teaches the Customer Development methodology in his Lean LaunchPad classes at Stanford University, U.C. Berkeley, Columbia University, UCSF, NYU, the National Science Foundation and the I-Corps @NIH. He writes regularly about entrepreneurship at www.steveblank.com.