Note that Apple's Books app works with books that were not purchased from Apple. You can simply send an epub file to Books app via the standard sharing function

Note that Apple's Books app works with books that were not purchased from Apple. You can simply send an epub file to Books app via the standard sharing functionality, from any other app. I assume it is allowed because it does not pose a security threat to the device, nor user, as opposed to allowing apps from outside the Apple Store. Edit: You can try it with Peter Watts' Blindsight ;). EPub download link is in the header: https://rifters.com/real/Blindsight.htm https://rifters.com/real/Blindsight.htm