I am coming close to the end of writing a first draft for my story. It is my first attempt at writing a novel. So, being inexperienced, I didn't think a great deal about what length the story should be, and instead let it come out of me naturally, it that makes sense. I have reached about 40K words. I know I need to go back and add detail at certain points, but still, it feels like it's turned out a bit on short side. So, possible explanations: I don't write in sufficient detail? My plot is not sufficiently in-depth? Should I accept that what I have written, is in fact, a short story? Or is it normal for a first draft to be fairly short, with detailed editing resulting in, say, doubling the length. I have toyed with the idea of introducing an additional plot line, running in parallel to my main plot, and having the two stories merge at the end. But as I hadn't originally planned for that, it might feel a bit forced. Advice / words of wisdom from veterans most appreciated!