Many great authors, including and especially Stephen King, write in such a way that around 1/4 to 1/2 of the book is usually introduction and characterization and that the main story elements really do not rear their head until the book has been going on for a while. I think this is a fantastic style. Books are not like movies, where time is short and the crux of the story needs to start rolling fairly soon. Books are to be delved into and enjoyed like a lengthy multi-course meal. If the first 125 pages set the scene, imagine how much impact the remaining 200 pages will have? EDIT- I know the title's grammatically incorrect. I made that mistake.