Strata

From Author Wars - https://authorwars.com/publications/strata-251434.html

Overview:

Title: Strata
Author: Terry Pratchett
Year: 1981
ISBN-10: 0901072915
Publisher: Colin Smythe
Price: £5.95
Pages: 192
Binding: Hardcover
Type: Novel
Title Reference: Strata
Notes:
Date from the publisher's website. 2000 copies of the first Smythe printing were imported to the US and sold by St. Martin's Press, which later printed their own edition of the title. Price from BLIC