Stephen King at his best. The titular dome appears in Chapter 1, and the action doesn't let up until the dome's origin is revealed at the end. I read the first hardcover edition shortly after it was published. It's a serious bug squasher, but I finished it faster than I've read many short paperbacks.

If you're only familiar with the miniseries, don't use that as your guide. That series was a slow, plodding soap opera compared to the book.