I think his former writer Vincenzoni even stated that he thought Leone was lying about Voyage and had also never read it... but I don't think they had spoke to each other for years at this point.
He at least talked about books in his latest years. I wanted to adapt Voyage Au Bout De La Nuit (the most influent book of the XXth century in France). But some sources said he never read books and was just trying to look more educated and intellectual than he was. I think his former writer Vincenzoni even stated that he thought Leone was lying about Voyage and had also never read it... but I don't think they had spoke to each other for years at this point.We'll just have to guess