Science Fiction Special (20)

From Author Wars - https://authorwars.com/publications/science-fiction-special-20-29146.html

Overview:

Title: Science Fiction Special (20)
Author: uncredited
Year: 1977
ISBN-10: 0283983752
Publisher: Sidgwick & Jackson
Price: £4.50
Pages: 158+176+278
Binding: Hardcover
Type: Omnibus
Title Reference: Orbit Unlimited
Notes: First printing as per copyright pgae. Precise pub date from review slip in PV1's copy. Artist not clearly credited, jacket design by Bartholomew Wilkins & Partners. Each novel or collection has its own (original) copyright page and ISBN and start at page 1.There is also a marked difference in paper quality between the two novels and the collection.