It looks like the dormant theme of raging against the App Store machine is working its way back into blogs across the Web, as The New York Times reports Apple has rejected Sony’s eBook reader app for iOS. Sony reportedly submitted its Sony Reader app for iOS to Apple recently, only to have it rejected for providing in-app purchases that weren’t piped through the App Store. But Apple has uncharacteristically commented on the rejection, basically saying it has begun enforcing a rule that requires Apple-facilitated in-app purchase options be included in apps that also allow content to be purchased from non-Apple sources, like Sony’s eBook store. “We have not changed our developer terms or guidelines,” Apple spokesperson Trudy Miller told AllThingsD. “We are now requiring that if an app offers customers the ability to purchase books outside of the app, that the same option is also available to customers from within the app with in-app purchase.” How this might affect currently available apps like Amazon’s Kindle app and Barnes and Noble’s Nook app is unclear.