I would like to give this book many more stars. It is fascinating, insightful, compassionate, well-researched, wide-ranging, and frequently quite funny. For all that it barely scratches the surface of the world it describes.
When most people hear fanfiction, they think either 'porn' or 'theft.' Neither is (necessarily) entirely inaccurate, but at the same time, as is so often the case, the truth is much, MUCH more complicated. And interesting.
I have written a little (and read a very little - I can't find the exact quote, but the author's comment on the invariability of new readers finding the absolute worst possible stuff to read is spot on) fanfiction. New to fandom as a passion in my late thirties, I am fascinated by the idea that something you watch or read can generate in you a whole new set of ideas and inspirations never before imagined. Five years ago I would have shrugged it off as 'weird.' And it is, a little. It's also thrilling; worlds are possible that never were before. The wardrobe opens to Narnia; the TARDIS appears at your door; an owl drops a letter in your mail slot, and the life you knew is gone. This book is an honest, accessible look at that thing, whatever it is, and what it makes possible in the world.
If you are a fan, or know a fan, read this. If you are interested in stories and storytelling, and how they both change and stay the same over time and technology, read this. If you are intrigued by the limitless creativity of the human mind, read this. You won't be sorry.