bA primer on the future of PR, marketing and advertising -- now revised and updated with new case studiesb pbForget everything you thought you knew about marketing and read this book. And then make everyone you work with read it, too. --Jason Harris, CEO of Mekanismb pMegabrands like Dropbox, Instagram, Snapchat, and Airbnb were barely a blip on the radar years ago, but now they're worth billions--with hardly a dime spent on traditional marketing. No press releases, no TV commercials, no billboards. Instead, they relied on growth hacking to reach users and build their businesses. pGrowth hackers have thrown out the old playbook and replaced it with tools that are testable, trackable, and scalable. They believe that products and businesses should be modified repeatedly until they're primed to generate explosive reactions. pBestselling author Ryan Holiday, the acclaimed marketing guru for many successful brands, authors, and musicians, explains the new rules in a book that has become a m