The Mammoth Hunters - first US edition
by Jean Auel
Third in the series of 4 books by Jean Auel about Ayla, the human who grows up in a prehistoric Neanderthal tribe. I knew the author from Tektronix, and also took a French class with her at Portland Community College.
Book is rust-colored boards with taupe spine, copper letters stamped on spine; map-illustrated endpapers with tiny owner date; owner stamp on half-title page.