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, the total sales of both e-books and their traditional counterparts fell by two percent during the year -- and let's be honest, it's not hard to see which group fell short. Also reflective of the shift is the fact that average book prices fell by 1.3 percent during the year, which compares favorably to the UK's current inflation rate of 4.47 percent. Those interested in the full story will find the PR after the break