Gilbert Tappa who, with Claude Boumendil (died 2025), set up Editions Bélisane, and who both edited and wrote several notable books about Rennes-le-Château, most importantly, for being the publishers of “Le Fabuleux Trésor de Rennes-le-Château! Le Secret de l'Abbé Saunière” by Jacques Rivière (1945-2006) in 1983; including the following:

Claude Boumendil, Gilbert Tappa,
“Rennes-le-Château, l'église: Tu le vaincras...” (1983, 1984)

With Claude Boumendil, Gilbert Tappa also founded the magazine ‘Les Cahiers de Rennes-le-Château’ in 1976.