This is an EXCELLENT follow-up to the question Stephen King fans have been asking since 1978: what happened to little Danny Torrence after The Shining?
The writing is vintage King, starts small and keeps building more and more pressure like an old steam boiler ready to explode!
And there are plenty of "Easter Eggs" throughout the book, including George R. R. Martin and J. K. Rowling, among others.
I would highly recommend reading The Shining before starting Doctor Sleep. While it isn't a direct sequel, there are a lot of things that Mr. King brings forward from The Shining that would be lost on the reader.