How many books do the hardy boys have?

Franklin W. Dixon is not a character but the author of the series - well, the printed author, anyway. This is just a pseudonym (a fake name of an author). In fact, the Hardy Boys books were written by various authors. Edward Stratemeyer actually created the characters (using the pseudonym so as not to embarass his family if the books bombed). Since his death, the series and team of authors was carried on by his daughter. By the way, the same goes for the Nancy Drew books which were also created by Edward Stratemeyer under the pseudonym Carolyn Keene. (See http://wiki.answers.com/Q/Who_is_the_author_of_Nancy_drew_Mystery_books ) See link below.