#3: Filling the Plot Gap

Book middles frequently involve beloved characters being in serious peril or coming to harm, a proliferation of plot threads that can feel out of control, or a mess of problems with no apparent solution. These are things that can be genuinely hard for writers to face, just as they're hard for characters to face. It's so much easier and more enjoyable to focus on the beginning, when everything's fun and exciting, and the end, when all the questions are answered.