Sales at Penguin for the first half of the year rose 9 percent, at 493 million pounds–as did sales across Pearson–and operating profit at the book publisher more than doubled, at 44 pounds (up from 21 million pounds a year ago). The company says the increase in margins is “the result of a strategy of targeted and sustained investment in publishing, digital change and reorganization.” They go on to cite “a series of organizational changes made in 2009 at Penguin UK and Dorling Kindersley to strengthen publishing, accelerate the transition to digital, reduce costs and shift design and production to […]