Duke University Press held a 50% off online sale from April 15-May 15, 2013 to drive sales and build their brand. They promoted the sale on their blog, Twitter, Tumblr, and Google+ and engaged followers by posting humorously and playing games. The sale resulted in more reading lists being created during the sale period than the previous three years combined. Top referring sites for the sale were Facebook, Twitter, and Wikipedia. The presentation discussed using social media platforms like Twitter for customer service and engagement during the sale.