The Exiles Trilogy

From Author Wars - https://authorwars.com/publications/the-exiles-trilogy-310263.html

Overview:

Title: The Exiles Trilogy
Author: Ben Bova
Year: Unknown
ISBN-10: 0425045250
Publisher: Berkley Books
Price: $2.50
Pages: 441
Binding: Paperback
Type: Omnibus
Title Reference: End of Exile
Notes: Stated second printing. No number line or publication date aside from "Berkley edition / June 1980".
Cover artist uncredited. No visible signature.