Question: What is the best known novel by the author whose work was the basis for the French film Thomas the Impostor? 
Sentence (from "Thomas the Impostor"): An American edition of the novel, translated into English by Lewis Galentiere, was published in 1925 under the title "Thomas the Impostor", and another English translation by Dorothy Williams was subsequently published in 1957 under the title "The Impostor".
Relevant evidence: No