This is the sixteenth in the October Daye urban fantasy series by Seanan McGuire. She's been building this rich, interesting series and illuminating its various nooks and crannies for quite some time. As a result, each new entry in the series (which arrive like clockwork every fall) works as much like a very enjoyable visit with old friends as it does like a book. The downside of that is that there's only so far she can go -- we want to recognize those old friends after all. But, she does a good job of keeping her characters growing and changing and, as a result, interesting. As expected, a very enjoyable read.