Bayard's most recent book Comment parler des livres que l'on n'a pas lus? ("How to talk about books you haven't read"), is a bestseller in France. His books have been considered as cases of "novelistic criticism," in that they present revisionist readings of famous fictional mysteries. In his 2008 book L'Affaire du Chien des Baskerville, for example, published in English as Sherlock Holmes was Wrong: Re-opening the Case of the Hound of the Baskervilles he analyzes the famous Sherlock Holmes case, and in his earlier book Who Killed Roger Ackroyd? he re-investigates Agatha Christie's The Murder of Roger Ackroyd. His book on Hamlet argues that Claudius did not kill Hamlet's father.