The logo of the Penguin publishing house, part of Pearson Plc, is seen on paperback books at a bookstore in London, U.K., on Friday, April 5, 2013. Bertelsmann SE's Random House won European Union approval to buy Pearson Plc's Penguin unit to create the largest book publisher in the U.K. and the U.S. Photographer: Chris Ratcliffe/Bloomberg via Getty Images