Behind the Walls of Terra

From Author Wars - https://authorwars.com/publications/behind-the-walls-of-terra-166581.html

Overview:

Title: Behind the Walls of Terra
Author: Philip José Farmer
Year: 1983
ISBN-10: 0722134290
Publisher: Sphere
Price: £1.75
Pages: 189
Binding: Paperback
Type: Novel
Title Reference: Behind the Walls of Terra
Notes: First published in Great Britain by Sphere Books Ltd 1975. Reprinted 1978, 1983. Same cover art as 1978 edition but title is now in black rather than wWhite. Cover art uncredited, signed "Melvyn". Credit from this site Other price: Malta £1.75.