Burgess had mixed feelings about the film adaptation of his novel, publicly saying he loved Malcolm McDowell and Michael Bates, and the use of music; he praised it as "brilliant", even so brilliant that it might be dangerous. Despite this enthusiasm, he was concerned that it lacked the novel's redemptive final chapter, an absence he blamed upon his American publisher and not Kubrick. All US editions of the novel prior to 1986 omitted the final chapter. Kubrick himself called the missing chapter of the book "an extra chapter" and claimed that he had not read the original version until he had virtually finished the screenplay, and that he had never given serious consideration to using it. In Kubrick's opinion – as in the opinion of other readers, including the original American editor – the final chapter was unconvincing and inconsistent with the book.