I suggest you read all App Review Guidelines if you haven't. The description of the app you provide seems to violate 4.2 Minimum Functionality.
If the main function of your app is to show a book content, whether or not you have invested tens of millions of dollars developing it, whether or not you hired someone to compose music, it's still a book, isn't it? Your book has a unique story. And therefore, it should be admitted, you mean? You may want to have a content that a book can't have.
Topic:
App Store Distribution & Marketing
SubTopic:
General
Tags: