The best-selling Canadian author Rosemary Sullivan recently declared that the case of Anne Frank’s betrayal had been solved. Anne and her family, in hiding in Amsterdam, had been denounced by one Arnold van den Bergh, a well-known notary and member of the Amsterdam Jewish Council who handed over lists of Jews in hiding to the German occupiers in order to save his own family. Sullivan had not been one of the investigators of this issue: she had written the book that set out their case, which had the eye-catching title, The Betrayal of Anne Frank . Generating considerable attention in...