What is the theme in The Dark Tower VII: The Dark Tower by Stephen King?

The author as character is another theme. In the Dark Tower VII: The Dark Tower, the author, Stephen King, makes himself a character in the story. This is called meta-fiction, a type of fiction that self-consciously addresses the devices of fiction, such as acknowledging the characters are in a novel, or someone is writing a novel within the novel. Stephen King is the author, but he is also a character in the novel. This character does not necessarily have the same characteristics as the real-life Stephen King, but is a representation of him in the story.