International Standard Book Number in 1965, has – 340 indicating the publisher, 01381 their serial number, and 8 being the check digit. This can be converted to ; the check digit does not need to be re-calculated. Since 1 January 2007, ISBNs have contained 13 digits, a format that is compatible with "Bookland" European Article Number EAN-13s. An ISBN is assigned to each edition and variation (except reprintings) of a book. For example, an ebook, a paperback, and a hardcover edition of the same book would each have a different ISBN. The ISBN is 13 digits long if assigned on or after 1 January
Number 13 (short story) Number 13 (short story) "Number 13" is a ghost story by British writer M. R. James, included in his first collection "Ghost Stories of an Antiquary" (1904). While researching church history in Viborg, Denmark, the narrator's cousin stays in a Danish inn. While staying in room Number 12, he notices that his room seems to grow smaller and his furniture sometimes vanishes. After hearing dancing next door, he assumes it comes from Number 13, however upon discussing the matter with the inn-keep, he learns that there is no Number 13. He asks the inn-keep to visit his room at night.