This weekend Miami streets will bustle with excitement and activity as authors, publishers and book-lovers of all ages explore the literary offerings of the Miami Book Fair International. One of the largest book fairs in the nation, the festival is expected to bring more than 200,000 visitors, 600 authors, vendors, food trucks and street music. But one thing that makes the 31st Annual International Book Fair different from all the others is a history-making moment in the publishing world.