This week I'm working on hand-drawn wireframes of a typical user flow through my interactive book. Just the process of drawing out "simple" wireframe book pages is making me think about things like being able to move backward as well as forward through the story, or being able to check progress, or jump to a specific page.
Of course, this is just the first pass at these wireframes, so we'll see how potential users react to and interact with them, and changes and improvements will be made. But every project has to start somewhere.
I'll add images of my wireframes when I'm finished.