Lisey's Story by Stephen King (2006) Scribner

Lisey Langdon survived her famous novelist husband, Scott Langdon.  It’s been two years since his death, and the converted barn that he used as his writing office needs to be cleared-out.  There are people who would give anything to get hold of his unfinished manuscripts and his notes.  There are people who would do anything to get them.  One is a thug who comes and hurts Lisey as a threat that she better turn over Scott’s works to him or else.  There is a fantasy aspect to the story known as Boo’ya Moon.  There Scott had special abilities, and a creature there posed ultimate danger.  It seemed an imaginary world to Lisey until Scott took her there.  Now she may have to return to use one predator to defend herself from her another.