Exit Earth

From Author Wars - https://authorwars.com/publications/exit-earth-12793.html

Overview:

Title: Exit Earth
Author: Martin Caidin
Year: 1987
ISBN-10: 0671656309
Publisher: Baen Books
Price: $4.50
Pages: 638+[11]
Binding: Paperback
Type: Novel
Title Reference: Exit Earth
Notes:
"First printing, April 1987" No printer's key. LCCN from LoC catalog lookup. "Cover art by David Mattingly" on the copyright page. Signature "©Mattingly 86" on the wraparound art back cover.