All hail the e-book! Seriously, if it weren't for this marvelous literary development, try saying with a straight face that you wouldn't at least take pause before adding a new title to your collection. Numbers are in from The Publisher's Association -- a group of 120 companies across the trade in the UK -- which reveals that e-book digital sales have increased 54 percent for the year 2011, and of that statistic, 13 percent of revenues came from academic and professional titles. As a sign of changing preferences,
