The first major text printed with movable type, the Gutenberg Bible (1454) symbolizes early print. Although this and other early printed books have long interested scholars, librarians, and collectors, many questions remain unanswered. For starters, how exactly did printing know-how spread from one town to the next? Who sold and transported the books from the workshops to the readers? Where did printers buy the vast amount of paper they needed to print their books? Who decided which content to print?