Finished the book about 30 mins ago. It is good book, but the weakest of the The Fall series.
I would rate The Crimson Shadow, A Ceremony of Losses and The Poisoned Chalice as some of best trek books and along side my favourites - The Destiny Trilogy, A Singular Destiny and DRGIII's Plagues of Night/Raise the Dawn.
Revelation & Dust took a while to get going, but once 'it all kicked off' it was great. I felt that Peaceable Kingdoms never found the 'high gear' the other 4 books possessed.
However, Peaceable Kingdoms carried the story and the series to a satisfying conclusion.