To Guard Against the Dark

As a wrap-up to the series, this book does a pretty good job of tying up all the loose ends -- but even though it's only been a year or so since I read the last one, I found that the narrative is so reliant on the reader remembering everything about the worldbuilding and events of previous books, that it was difficult reading. Fans of the series will enjoy it; I do not recommend it, though, for anyone who hasn't read the previous 8 books in the series.