The Next Web writes, Pottermore, the Sony-endorsed company with exclusive digital rights to the Harry Potter series of books, is set to continue the expansion of the hugely successful JK Rowling novels after it revealed plans to bring the e-book series to Japan this summer. There’s no confirmed date or price just yet, but the Japanese Potter series will be available in EPUB3, a cross device format that allows the content to be download to and read via a series of devices and platforms, including PCs, e-Readers, tablets and smartphones. Digital publishing and er-eaders are big business in Japan, and the...