* The name is misspelled: Double-check the spelling of the author's name.
* The author is less known: They may be a niche author or write in a specific genre or language that's not readily searchable.
* The author is not published: They may be an unpublished author who has not yet released their work.
If you can provide more information about the author or the works you're looking for, I might be able to help you find them.