Where Good Ideas Come From is an interesting, fast paced read that outlines the kinds of environments which spawn world-changing ideas. In a sense, this book is the summary of “lessons learned” from several of Johnson’s previous books, which go deep into one really big idea – The Invention of Air, for example, or the discovery of a cure for cholera. It’s also a testament to another of Johnson’s obsessions – the modern city, which he points out is a far more likely seedbed of great ideas than the isolated suburb or cabin-on-a-lake-somewhere.