I'd have to agree with Rich as far as interactive books working better for children books. It's easier for children books to produce games because that's more of the focal point to get kids engaged. As adults it's a little more challenging to engage and still have the story read. I came across this video from that Mike Matas talked about his idea of interactive books. I thought this was interesting and worked for adult books. It's not to flashy and a creative and not a distracting way to get through the story while having the visual elements and keep everything engaging. Check it out.
