It's possible that:
* The name is misspelled: Could you double-check the spelling?
* The author is less well-known: Maybe they have written niche works or works in a different language. Could you provide any more context, such as the genre or subject matter of their writing?
* The name is a pseudonym: Perhaps they use a different name for their published works.
Please provide more information so I can help you find the author you're looking for.