12. A computing device comprising: a display; a manual selector; one or more computer processors; and computer-readable storage media having computer-executable instructions thereon, the instructions, when executed by the one or more computer processors, causing the computing device to perform operations comprising: receiving a selection from the manual selector to open, or flip through pages of, an electronic book; and responsive to the selection, presenting, on the display, a page of the electronic book having an affinity or a flip through of multiple pages of the electronic book, the flip through stopping, slowing, or pausing at one or more other pages of the electronic book based on affinities associated with the one or more other pages, the presenting rendering the page of the electronic book having the affinity at full resolution and rendering other of the multiple pages of the electronic book as an approximation, the presenting rendering the page of the electronic book having the affinity and the other of the multiple pages at a same size.
13. A computing device as described in claim 12 , wherein the instructions when executed by the one or more computer processors further perform an operation comprising determining, based on a history of the electronic book, that the page or the one or more other pages of the electronic book has the affinity or the affinities, respectively.