IMNHO it's still a homemade bug, Rugster (the book). As I wrote, I checked it out and the pyramids are dead - because they don't "exist" for the game. But I believe a discussion about this is futile => difference in opinion.
Testing is a difficult thing: Even all fantasy and imagination of what gamers can think of is not covered 100%. I for myself never had the idea of putting my pyramids into thís book. I kept it for quest items I might need later on - my pyramids were always in the normal inventory.
Anyway: you can still carry on in the Wastelands: The ancient pyramids, did you find them?
As for wrong spell books = correct that's a bug. Happened to me in Ars several times.
Kiya