In many cases when a reader puts a story aside because it 'got boring,' the boredom arose because the writer grew enchanted with his powers of description and lost sight of his priority, which is to keep the ball rolling.
Stephen KingWell, I'm like a drug addict, I'm always saying I'm going to stop, and then I don't, what I've said consistently is that I hope I know when to stop: when it starts to get repetitive.
Stephen KingThere came a time when you realized that moving on was pointless. That you took yourself with you wherever you went.
Stephen King