Another nail in the coffin of traditional book publishing comes with news that J.K.Rowling has joined the ebook revolution. A few authors and publishers have so far been holding out against ebooks, hoping the Kindleistas would get bored and throw away their new fangled devices. Not so. ePotterisation will generate an unprecedented demand for Kindles, Nooks and the rest. But the real growth will be in ereader apps for iPhones and Androids. Once converted, young readers are unlikely ever to return to their paper volumes. This is a huge boost for epublishing.