Professor at University College London and host of leading scientific TV and radio programs, Hannah Fry explains in an accessible and engaging way how computer programs control the world and our perception of it. She also explores the limits of their capabilities. The latest experiments, incredible discoveries, and amazing facts: what we know today about computer intelligence. This book does not scare the reader with a machine uprising or a rebellion of computer intelligence against its creators. On the contrary, it shows how dependent machines are on humans. "Never before has a human been as important as in the era of algorithms," asserts Hannah Fry. We create the algorithms that dictate how computer programs operate. Yet amazingly, we ourselves become dependent on these programs, which increasingly govern many aspects of our lives: filtering the information we seek, selecting the products we want to buy, plotting routes to the places we want to reach. This strange interdependence of humans and programs will largely determine our future. Fry's book vividly shows what modern programs are capable of and what lies beyond their capabilities, how they collect information about us on social networks and how we use this information, how we create them and how they, in turn, change us.