The Upstarts: How Uber, Airbnb and the Killer Companies of the New Silicon Valley are Changing the World

Most people have either reserved a taxi using Uber or booked a room in someone's house via Airbnb. Both companies are an everyday fixture in our lives yet despite the fact that neither of them have any physical assets, they're worth billions of Dollars. The Airbnb and Uber founders belong to a new generation of tech entrepreneurs whose ambition, limitless drive and "anything's possible" attitude have earned them the nickname of "The Upstarts". That's also the name of a new book analysing the rise of such companies, and how these and other Silicon Valley organisations are changing the world. Juliette Foster speaks to best-selling author, Brad Stone.