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Rocket eBook. Page from Alice in Wonderland displayed on a Rocket eBook, a type of electronic book, resting on a pile of books. It can store 4000 book pages, equivalent to about ten paper novels. The electronic text for an eBook may be bought from online bookstores, or text, graphics or sounds downloaded from a personal computer or the Internet. Text can then be manipulated using a stylus on the eBook's touch-sensitive screen. The font may be altered, sections bookmarked, notes made in the margin, words searched for, ot text underlined or reorientated. This eBook, which weighs just over 600 grams, has a rechargeable battery that lasts for up to 40 hours. (KEYSTONE/SCIENCE PHOTO LIBRARY/TEK IMAGE)