It's possible:
* The name is misspelled: Double-check the spelling. Maybe it's a different variation like "Desmond Hamill" or "D.S. Hammill."
* The author is relatively unknown: It could be a lesser-known author who hasn't gained widespread recognition.
* The author is a pseudonym: Sometimes authors use pen names.
To help me find the right author, could you provide more information?
* Genre: What kind of books do you think they write? (fiction, non-fiction, poetry, etc.)
* Specific books or titles: Do you know the names of any books they have written?
* Any other details: Do you have any other information about the author, like their nationality or the time period they wrote in?