I did find the articles helpful. In my own researching, I found these articles. These are more guides that show how people interact with interactive ebooks.
8 Amazing Examples of iBooks Author in Action
About Best Interactive Ebooks
I guess my first problem was figuring out how to design for an app, not the web. All of my first design solutions were very similar to something you'd see on a website. However, after watching some videos on different interactive ebooks and reading through articles, I started concentrating on the physical motions people use through swiping and using that to guide the user through menu items and information more smoothly.