Why is your e-reader the size and shape that it is? Because it’s trying to mimic the books you used to read. And they were the size and shape they were mostly as a result of the size of the sheets of paper that one man could comfortably make by hand, from linen rags, a single sheet at a time. Or, if we go back even further, as result of the size and shape of the parchment sheets that could be made from the skins of calves, sheep and goats. The ancient technologies of the book reappear, transformed, at the bleeding edge of new technology.