Personification, metaphor, and simile are the main figurative language used in the book. the imagery is describing the journey of Bilbo a young hobbit that was hired by dwarves to be a thief so the can get their gold back.
A short story conserves characters and scenes, typically by focusing on just one conflict, and drives towards a sudden, unexpected revelation. Go easy on the exposition and the backstory, your reader doesn't need to know everything that you know about your characters.
The conflict is that the wife's husband is turning into a human at night.