Under the Dome

I never liked the ending. Seemed such a cop-out.

I kinda agree, but I almost always find the endings of Stephen Kings stories to be quite underwhelming. Under the Dome and Needful Things are both prime examples of this. I think it's more about the "journey" and what happens to the characters during the course of it, rather than how it ends. I suppose the way he writes it is that the entire book should be memorable, rather than having just a memorable climax.