This a book that is a sort of stand-alone even if it's part of Discworld. It doesn't feature any of the usual characters and it's not set in the usual spot.
It's full of food for thought, funny as only Pratchett's book can be, but also full of food for thought and cutting remarks.
It talks about religion and Mr Pratchett had something to say, something very clever and very important in our days of dogmatism and sectarism.
I wouldn't recommend it as the first in Discworld but it's an important book as there are references in Carpe Jugulum and other books in this series.
It's highly recommended as usual
Many thanks to the publisher and Netgalley for this ARC, all opinions are mine