The Starchild Trilogy

From Author Wars - https://authorwars.com/publications/the-starchild-trilogy-140921.html

Overview:

Title: The Starchild Trilogy
Author: Frederik Pohl, Jack Williamson
Year: 1986
ISBN-10: 0671655582
Publisher: Baen Books
Price: $3.95
Pages: 442
Binding: Paperback
Type: Omnibus
Title Reference: The Reefs of Space
Notes:
First Baen Printing, March 1986 Cover art shown is not exact. Art shown is from the 1992 Baen reissue. Actual cover art had a smaller line of text (sideways) near the top right beneath the Baen logo. Actual cover has only the Baen catalog number 65558-2 followed by the price $3.95. (Pictured artwork includes a Canadian price which did not appear on this issue.)