To help find more information, please provide:
* Full name: Is it J. Gillis Wetter, J.G. Wetter, or something else?
* Genre or topic: Do you know what kind of books they might write (e.g., fiction, non-fiction, history, etc.)?
* Any other details: Do you know anything else about the author, like their nationality or approximate time period they might have written in?
With more information, I can try to assist you further.