As a writer, there are really at least three distinct sides to Stephen King: abject horror, bittersweet stories, and baseball.
This one's baseball, mostly.
King does a great job from the start in building suspense with Billy - you know something bad's going to happen from the start, but what? (remember, this is Stephen King: zombies? ghosts? aliens? or just a baseball thing?)
I won't tell. One reason this book is good is because you don't know ... until you do.
Another reason it's good? Stephen King.