I can't say a whole lot about this because spoilers, but I was hooked almost immediately. I couldn't put this book down. I thought it would take me a week to finish and it took me 4 days. I read quite a few reviews that the ending was weak, and fizzled out. But I liked the ending, it tied it up nicely. Maybe a nicely tied up ending isn't what we've come to expect from King, but I thought it fit in this instance. Obviously the writing and character development was excellent, as to be expected. 

Highly recommend.