No good deed goes unpunished. But really, apps and books are apples and oranges. Similar in one regard, both are digital goods, but not in important ones that matter strategically. Apple doesn’t have the stranglehold on ebook reading that they have on apps. For those who don’t know, you can’t buy ebooks on iOS without paying an Apple tax, but as many kindle users know, you can of course buy kindle books via a browser and then read them in the kindle app. Not to mention the work that goes into custom developing an iOS app compared to simply compiling text an editing to whatever format Apple requires.