By book 7 Sir Terry was very much in the swing of his Discworld series. His world building was growing more complex and self referential. Pyramids takes us to one side of this. Deeply rooted in recognisable Victorian understandings of Egyptian culture with a broad overlay of modern maths and Typical Pratchett humour, this book is a delight. Once you get past the not so obvious pun of the name of the kingdom, there are many byways to follow that meander out from the main story into quantum physics, ancient Gods and the true nature of camels. Thought provoking as only Sir Terry could be, this is laugh aloud funny to boot. Worth reading and re-reading.
I usually love Terry Pratchett's writing style but this book didn't really follow the usual Discworld characters. It almost lacked any real story cohesion. It was just a series of random events that kind of linked in for convenience sake. Not something that I think is required reading for Discworld fans.
I've read it twice and probably enjoyed it more the second time because I could stop to get jokes and meanings that I'd missed in my hurry to find out what happened next. It's typical Terry Pratchett - a relaxed and entertaining read with little needles of philosophy and satire slipped in.