A novel takes a while to write. This one [A Wizard of Earthsea] went pretty quickly and easily, though I didn’t have a plot outlined out when I started, but I knew what the story was. I knew who my Sparrowhawk was, and in a general way I knew where he was going—where he had to go, not only to learn to be a wizard, but to learn to be Ged. Then, as I wrote his story, what he did and said, where he went and the people he met, showed me and told me what he had to do and where he had to go next.
Ursala K. LeGuin