If these templates will live in `templates/gh-book` then an issue should be created to add all the other templates in `gh-book` into the same directory. I'm personally in-favor of moving `gh-book` out of `scripts` and into a top-level dir. That way it is still:

- easy to remove to get a testable `atc`
- fits in with my goal of having a Common Book Editor repo that `atc` and `gh-book` both depend on.