I avoided this book for quite some time. I regret that I waited so long.
This book is the continuing of The Shining, which was written nearly 30 years ago. In that story, a family stays at a haunted hotel and serve as the caretakers for it during the winter. They are completely along.
The ghosts make the father go crazy and try to kill his family. The young boy has something called the shining. Essentially, it's a psychic ability. Doctor Sleep picks up with this young boy as an adult with similar alcohol and drug problems that his father had, but he keeps his shining in check, for the most part.
He settles in a small town and tries to get his life together, until someone reaches out to him psychically. It turns out to be a young child, which an even greater shining than he has. Then, it turns out that there is a terrible group of people called the True Knot that essentially like to eat the essence of people with the shining, which kills them. Now, he's called to stop the True Knot. It was a really great book. It helps to have read The Shining already because there are several mentions of it that won't make sense if you haven't read it.
I'm an avid reader. One thing I've learned in my many years on this Earth is that no matter what is happening in your life, you can always benefit from temporarily escaping life in order to become absorbed in a make believe story.