This book's read, being the fifth entry in the city watch series, I approached fearing a rushed book that was always on the chase, like in Jingo.
I was happily surprised by the more personal dimension of the book, albeit still, as the last one, discussing great themes like tradition, different cultures etc..., since I find that's where Pratchett has been shining as an author for me.
The only reason I feel I cannot give it five stars is that I would have liked more book in this book, more time for the characters, especially Sybil, and generally a quieter pace for the narrative.
Otherwise, as always, it's just a great read I'd totally recommend.