It's possible that:
* The name is misspelled. Double-check the spelling of the author's name.
* The author uses a pen name. You could try searching for other potential names they may use.
* The author is relatively unknown. It's possible they are a self-published author or write in a niche genre.
If you can provide more information, such as the genre they write in, the titles of any books you know they've written, or a possible publication date, I may be able to help you find more information about the author.