A new study prepared by a fellow at Columbia’s National Arts Journalism Program at Columbia University, takes a serious look at the evolution of the book industry in America. This is not a story of doom and gloom. “The number of new books published annually in the United States increased about 300 percent between 1975 and 2000, to 122,000 from 39,000. More people are buying better books than ever before – they’re also purchasing more books of questionable merit, but hey…