What has the author John Trevor Haworth written?

There is no widely recognized author named John Trevor Haworth. It's possible that:

* This is a misspelling. Double-check the name for any errors.

* The author uses a pen name. Perhaps they publish under a different name.

* The author is relatively unknown. It's possible they have published works but haven't gained widespread recognition.

To find more information, try:

* Searching online databases: Look for the author's name on Goodreads, Amazon, or LibraryThing.

* Searching for books by title: If you know the title of a book by this author, search for it online.

* Checking library catalogs: Search for the author's name in your local library's online catalog.

Please provide more context or information if you have it, and I can help you find the author's work!