What has the author J D Armstrong written?

There is no widely known author named J.D. Armstrong. It's possible you've misremembered the name or there's a lesser-known author with that name.

To help me find the author you're looking for, could you please provide more information? For example:

* What kind of books do they write? (Genre, e.g., fantasy, romance, sci-fi, thriller, etc.)

* Do you remember any specific book titles?

* Are there any other details you can recall about the author or their work?

With more details, I can hopefully help you find the author you're looking for.