It is worth mentioning how much fun this book is to read. There are in jokes, sidebar commentary and examples from playtesting scattered throughout. The materials a pleasure- especially when you come to the sections on conspiracy building, running in European cities, and gamemastering GUMSHOE in general. It offers a number of really great ideas for running any kind of modern game: investigation, conspiracy and/or supernatural. I’d recommend it as a sourcebook for that alone.