The Alchemy of Air (http://www.thomashager.net/worlds-greatest-invention/). Ever wonder why nitrogen is so important to us and why it has become such a massive and important industry? This book brings historical and scientific perspectives to these questions. And, along the way you’ll also learn some really quarky facts, like how the U.S. has a law that allows any citizen to lay claim to an island that is full of bird poop.