Le ravin des ténèbres

From Author Wars - https://authorwars.com/publications/le-ravin-des-tenebres-330745.html

Overview:

Title: Le ravin des ténèbres
Author: Robert Heinlein
Year: 1974
ISBN-10: 2226000429
Publisher: Albin Michel
Pages: 380
Binding: Paperback
Type: Novel
Title Reference: Le ravin des ténèbres
Notes: Unknown printing rank (probable 1st). No obvious price on book except what seems to be 12.00 (coherent with the fact that the book is noticeably longer then other titles in the series). Cover not illustrated. Note use of smaller print than usual, due to length of book.