NPD BookScan gathers point-of-sale book data from about 16,000 locations across the U.S., representing about 85 percent of the nation’s book sales. Print-book data providers include all major booksellers and Web retailers, and. Posts about Colorado Constitution written by William R. Bramscher NEW YORK (AP) – The theatrical event in which famous actors and musicians read out memorable real letters from history is coming to America with such celebrities as…