Out of Paypal's ranks have come three billionaires and dozens of multi-millionaires, including household names like Elon Musk, Peter Thiel and Reid Hoffman. Paypal's alumni have built, funded and advised almost all of the billion-dollar-plus companies to emerge from Silicon Valley in the past two decades. Today, every online video you watch and every internet purchase you make bears PayPal's fingerprints -- its inventions made the modern internet possible and are embedded in our social networks, our banks and our intelligence agencies. This book tells the gripping story of how a scrappy start-up became one of the most successful businesses of all time, worth over $70 billion today. Full of fascinating characters and anecdotes about Silicon Valley's biggest titans, The Founders also shows how the so-called PayPal Mafia continue to shape our future today.