Some people read every single word of a book, even if they don’t like it. Me? I’m a page-skipper. If the story starts to become uninteresting for me, I skip ahead to the place where it becomes interesting again. The culprit is nearly always a subplot that isn’t woven well into the book, or one that doesn’t fit the type of book. It does usually mean though that the main storyline is interesting enough to keep me reading and it’s a misfire on the subplot.