Les mains sanglantes de Léonox

From Author Wars - https://authorwars.com/publications/les-mains-sanglantes-de-leonox-514263.html

Overview:

Title: Les mains sanglantes de Léonox
Author: Paul Béra
Year: 1972
Publisher: Fleuve Noir
Pages: 234
Binding: Paperback
Type: Novel
Title Reference: Les mains sanglantes de Léonox
Notes:
- Probable first printing, as per DL and copyright.
- DL = 4th trimester 1972; undated AI.
- No ISBN.
- No price on book.
- No art credit, but Michel Gourdon is well known for having illustrated all the covers of the "Angoisse" series, and his signature is clearly visible.