Although the first of the Bond books to be made into a film, "Dr. No" was not the first of Fleming's novels, "Casino Royale" being the debut for the character; the film makes a few references to threads from earlier books.
Although the first of the Bond books to be made into a film, "Dr. No" was in fact the sixth, not the first, of Fleming's novels: "Casino Royale" being the debut for the character. However, the film makes a few references to threads from earlier books.