First and foremost, I love the idea and the reader seems really nice done. That being said, the controls on the reader are a pain to use at first. Bookmarks are

First and foremost, I love the idea and the reader seems really nice done. That being said, the controls on the reader are a pain to use at first. Bookmarks are extremely confusing until you've made two or three of those to see how they work. I think the buttons on the menu should have some hover text or there should be a tutorial available to understand how the controls work on the reader. I really like the idea and think you have a great product. Good luck!