What's the Difference Between a Halloween and a Harry Potter?

On a holiday like Halloween, we must return to our guiding principles. Is this good and true and beautiful? Or am I celebrating it in a good way? What's the difference between reading Narnia or Lord of the Rings or Harry Potter? And my standard for that is Scripture. It's the gospel that Epic arc of a story across the Old and New Testaments with a God who is good and strong.