I'm very curious to know what your ethical dilemma is. I've read the man who was Thursday a couple times, and I'm having a hard time thinking what you might find objectionable about it that isn't giving away pretty early in the story or "spoiled" by a passing familiarity with Chesterton.

I don't see suitable contact info in your profile, but if you have a minute I'd be glad to receive an email via the address in mine.