A "Print Run" refers to the number of copies of a book or other printed material produced in a single production cycle. Publishers determine the size of a print run based on factors like anticipated demand, budget, and marketing strategies. A larger print run can reduce the cost per unit, while a smaller run may be used for niche markets or limited editions. Once a print run is completed, the printed materials are distributed to retailers, libraries, and other outlets. The success of a print run can influence future decisions about reprints or new editions, impacting the overall success of the publisher and the author.