West of Eden is the first book in Harry Harrison’s Eden Trilogy. The first US edition was published by Bantam in 1984, with wraparound art by David Schleinkofer. The uncredited jacket designer used all-caps Fandango for the typography, mixing glyphs from its plain and Ornamental styles.
About the book:
In this brilliant acclaimed novel dinosaurs still rule the Earth. The cosmic catastrophe that ended the Age of the Dinosaurs 65 million years ago never happened. The evolution of the great reptiles continued, climaxing with the Yilanè, the most intelligent and advanced race on Earth. But when the onset of a new Ice Age forces them to cross the ocean to explore and colonize a vast contingent, they clash violently with a savage new breed of mammal that they have never before encountered. Mammals that walk erect, hunt and use crude stone tools – and weapons…
[More info on ISFDB]