1. An electronic reader comprising: a display for visibly rendering electronic books; one or more processors; one or more computer-readable media containing instructions that are executable by the one or more processors to perform actions comprising: receiving a page/position map that indicates correspondences between page labels of a print version of a book and positions within an electronic version of the book; and referencing the page/position map when rendering the electronic version to provide user navigation based at least in part on the page labels of the print version.