It's possible:
* There's a typo in the name. Could it be "Anthony G Beckett"? It's worth checking for similar spellings.
* The author is less known. If this is the case, you might need more information to find their works (like their genre, publication dates, or other titles).
* The author uses a different name. Perhaps they write under a pen name or have a different surname for their published works.
Could you provide more details about the author you're looking for? This will help me find the information you need.