Down the home stretch of this series and in Book 6, Arthur's story really intensifies.
This book features the 2nd most powerful Trustee, yet surprisingly spends the least amount of time on her than any of the other 7. Nevertheless, some very interesting story lines in this book; the teasing of Lord Sunday over Saturday and Saturday's eternal battle to reach the Incomparable Gardens; the very curious nature of Saturday's Denizens/sorcerers (made extra humourous for anyone who happens to work in an office environment); another intriguing Part of the Will; and the feeling that the end is very near.

From my perspective, by the time you reach Book 6, plan on not wanting to put this book or the last one down until you are finished.