Curiosity is the instinct that prompts us to act, and a book about curiosity should tell us how to live. This is the first to do so, with its twelve rules for life. While a fatal sin in Eden, curiosity is a necessary virtue in our world. It asks us to search for new experiences, to create, to invent. It tells us to look inward, to be curious about the needs of other people and about our own motives. It tells us not to be a stick in the mud or a bore. In particular, curiosity asks us to examine the most fundamental questions of our existence. When you put all this together, curiosity tells you how to live a life in full. While there's a natural desire to explore, there's also a natural desire to stay home. We have a dark side that wants to hide from the world. We've also been made incurious by the rise of bitter partisanships and narrow ideologies that have sent things and people we should care about to our mental trash folders. That’s why this book is needed today.