A self-described efficiency monster, Justin Kerr is the author of the rogue corporate playbooks How to write an email and How to Be a Boss. He is also the mouthpiece of the MR CORPO podcast and has been the youngest senior executive at some of the world's biggest apparel companies (Gap, Old Navy, Levi's, UNIQLO) running billion-dollar businesses while finding time to write 14 books, tour the country with his rock band and keep 100,000 bees on his roof.