**The instant *New York Times* bestseller, now available in paperback and featuring a new afterword from the author—the insider’s guide to the Facebook/Cambridge Analytica scandal, the inner workings of the tech world, and who really runs Silicon Valley** **“Incisive…. The most fun business book I have read this year…. Clearly there will be people who hate this book — which is probably one of the things that makes it such a great read.” — Andrew Ross Sorkin, *New York Times*** Imagine a chimpanzee rampaging through a datacenter powering everything from Google to Facebook. Infrastructure engineers use a software version of this “chaos monkey” to test online services’ robustness—their ability to survive random failure and correct mistakes before they actually occur. Tech entrepreneurs are society’s chaos monkeys. One of Silicon Valley’s most audacious chaos monkeys is Antonio García Martínez. After stints on Wall Street and as CEO of his own startup, García Martínez joined Facebook’s nascent advertising team. Forced out in the wake of an internal product war over the future of the company’s monetization strategy, García Martínez eventually landed at rival Twitter. In *Chaos Monkeys* , this gleeful contrarian unravels the chaotic evolution of social media and online marketing and reveals how it is invading our lives and shaping our future.