I'll continue looking into a future save system. I need to know a little more about code than I do right now, though. I wanted to try to incorporate something for book 2, but I couldn't get it to work the way I wanted it to.
As for how the choices will be implemented, there will be two options at the beginning: you can read a recap of the events of book 1 and answer questions about your choices and then there's the short recap that's questions only.