If the word “theme” gives you flashbacks to high school lit class and your withered soul is croaking “Kiiiiill meeeee,” relax. This is not about guessing the intention of some writer who’s been dead for 400 years (or, more accurately, guessing what the teacher’s guide guesses was the intention of some writer who’s been dead for 400 years). There will not be a test. Theme is but a tool in the writer’s toolbox, as a hammer is in a carpenter’s. The person reading the book or sitting in the chair can sense the stability of the structure without ever thinking about the tools used to achieve it. Only the craftsman needs to know how it was accomplished.