PWCW: DBD Up 40 Percent In 2006 PWCW has a decent profile of Diamond Book Distribution through an interview with VP of Sales and Marketing Kuo-yu Liang. There are actual numbers bandied about, and specific titles discussed when it comes to the "predicting 2007" section of the article, which put it in the top five percent of comics-related business articles before you even get to the rest of it.