Discusses the radical companies of the new Silicon Valley that are rewriting the rules of business and sidestepping ethical and legal obstacles in the process.

Introduction -- Part I: Side projects. The trough of sorrow: the early years of Airbnb -- Jam sessions: the early years of Uber -- The nonstarters: SeamlessWeb, Taxi Magic, Cabulous, Couchsurfing, Zimride -- The growth hacker: How Airbnb took off -- Blood, sweat, and ramen: how Uber conquered San Francisco -- Part II: Empire building. The wartime CEO: Airbnb fights on two fronts -- The playbook: Uber's expansion begins -- Travis's law: The rise of ridesharing -- Too big to regulate: Airbnb's fight in New York City -- Part III: The trial of the upstarts. God view: Uber's rough ride -- Escape velocity: Fights and fables with Airbnb -- Global mega-unicorn death match!: Uber versus the world -- Epilogue.