I have to admit, I sniffled a bit towards the end.
This book is probably more of a three-and-a-half than a four star book, but I bumped it up because it certainly isn't a three. I loved Mau and Ermintrude/Daphne and large parts of the story. I just felt the plot seemed to skip some vital explanations to make everything make sense. Also thematically the book was simultaneously heavy-handed and obscure.
It definitely didn't feel like a Terry Pratchett book - it's stylistically very different to any of the Discworld books I've read anyway, even the ones aimed at younger readers. This isn't a bad thing, but it's a little odd when you're so familiar with his work. It's... very matter of fact.
And in some ways, very, very sad. And yet uplifting. And I have no idea what I'm trying to say.