Kind of an odd book until you really think about it. Terry Pratchett is a master of humour but this book lacks it, somewhat. Maybe not actual humour itself, but the amount of it you find elsewhere.
I dislike cats though not enough to do anything about it but even I can see their wonderful attributes as described here. I think you'd need to love cats or Terry Pratchett to really understand this book. It is all founded on truth which means it's all a pack of lies, though funny.