Audiobook Title:
Strata (Unabridged)
By: Terry Pratchett

Discovering two of her employees have placed a fossilised plesiosaur in the wrong stratum, not to mention the fact it is holding a placard that reads "End Nuclear Testing Now", doesn't dismay the woman who built a mountain range in the shape of her initials during her own high-spirited youth.

But then came a discovery of something that did intrigue Kin Arad. A flat earth was something new....