E-books, however, provide fewer spatial landmarks than print, especially pared-down versions like the early Kindles, which simply scroll through text and don’t even show page numbers, just the percentage already read. In a sense, the page is infinite and limitless, which can be dizzying. Printed books on the other hand, give us a physical reference point, and part of our recall includes how far along in the book we are, something that’s more challenging to assess on an e-book.