I have a love/hate relationship with Stephen King's writing, sometimes he releases some of the best plotting and character development I have ever read, other times it's the opposite. Stephen King has super-impressed me this year. My wife and I listened to the audiobook version of Under the Dome earlier this year, and I was blown away. It is not only the best Stephen King book I have ever read but it is probably the best book I have in the past decade, without exception.
As a side note, please do not judge the book by the TV show of the same name. The TV show is pretty good, but has nothing on the book.