Les captifs de l'Ombre Jaune

From Author Wars - https://authorwars.com/publications/les-captifs-de-lombre-jaune-584835.html

Overview:

Title: Les captifs de l'Ombre Jaune
Author: Henri Vernes
Year: Unknown
Publisher: Marabout
Pages: 155
Binding: Paperback
Type: Novel
Title Reference: Les captifs de l'Ombre Jaune
Notes: Unknown printing rank (circa 1974 as per SF titles listed).
No price on book nor ISBN.
Artist not credited.