When I was done, I didn't have any great big gaps that I could see, and there was nothing hanging around looking forlorn and out of place. From this I conclude that I have an actual book here, and all I have to do is finish writing it. (All!)
One of the most common bits of writerly wisdom I've heard online and at conventions is that you don't learn how to write a book, you learn how to write this book. Seems to be true. I've never written each chapter on a notecard before. This time it seemed like the obviously reasonable thing to do. I have no idea whether the revision methods I've used on What We Did to Save the Kingdom will be totally sensible on The True Tale of Carter Hall when I finish it, or whether they'll seem awkward and completely unusable. Luckily, I'm not really tied to either idea.