I've been working on a novel called . I'm following the formula - First act, introduce the characters - Second act get them in the worst situation you can imagine - Third act, get them out of it.
So far I've just finished the second act. I'm working on the third. I have a solution but I think it needs polish, so I'm stalling until my thinking on it crystalizes. If it doesn't I'll just start writing again. So far some of my favorite bits come from ideas that just pop into my head as I'm writing.
Of course this is all based on The Artifact world and explains a lot of things that are hard to explain in a RPG book.