Fiction by Stephen King.
This book belongs with Stephen King's "Dark Tower" series, (which contains at least seven novels not including the Marvel Comics graphic versions) but according to the notes it can be read as a stand-alone story.
I have not read any of the Dark Tower books, but I took a chance and read this book. It was true; the book was a good story all on its own. It was a little different, with a story-within-a-story-within-a-story format, but it was still enjoyable to read.
I also read by this author: Finders Keepers, Mr. Mercedes, Dreamcatcher.