Perhaps a couple of puzzles thrown in to break up the story elements, these don't have to be complex, or perhaps some kind of stats for the player which the story might impact upon?
I can tell that its really well writen, but I wasn't really prepared to read a book, I like the ability to read more details.
If your going to take data from the player it might help if these play some kind of roles on story lines or have some kind of impact in the future.
Covers one of the themes quite well.