Roger Elefant is a French writer who has written (only in French) on a range of ‘New Age’ subjects – Mu, hollow earth, UFO’s, the Ica Stones etc., etc. His books appear to be mainly a mish-mash of other writers ideas with Robert Charroux and Edgar Cayce^(a) figuring prominently. His ideas on Atlantis are just echoes of Cayce’s ‘visions’ and like Cayce the few references to Plato are usually only encountered en passant. I found little originality in Elefant’s work except when I read his claim that Tiwanaku had been built by the Vikings^(b) !!!

^(a)
http://atlantide-mu.over-blog.com/article-atlantide-legende-71885756.html

^(b) http://atlantide-mu.over-blog.com/article-mysteres-du-monde-72336522.html