A gamebook is what it sounds like. It's a book that tells a fictional story that you get to participate in one way or another rather than just reading. It's why you may ask the question of what verb you're supposed to use when talking about it.
However, for something like a story, you need to be a little more concise. It's important to do more with less if you want to keep people interested in your plot. That isn't to say you shouldn't take the time to tell a joke or to add in a scene that's not incredibly relevant.