http://chronicle.com/img/photos/biz/linguafranca-45.pngBy . Books are no longer books, at least not what was meant by book a generation ago: an extensive work made of letters that build sentences shaped into paragraphs, written on pages glued together and bound in covers. That, at least, still describes the yellowish copy I bought in 1985, on the New York City streets, of Fahrenheit 451, which sits tightly in my personal libraryMore...