According to Ben Lorica from O'Reilly, "Books as Apps" is the fastest growing segment of application developement in the App store. Here's what's happening: Instead of just selling an eBook through Amazon and the other online distributors, Publishers (with help from developers like Scrollmotion) are creating their own app out of a book. They can then sell the app with all of the freedom that Apple has allowed its other developers. The "Books as Apps" category has grown 280% in the last three months alone and is threatening to overtake categories like Entertainment and Games. Read more.