* The name is misspelled. You may want to double-check the spelling.
* The author uses a different name. Some authors use pen names or have published under different names throughout their career.
* The author is relatively unknown. New authors, especially those writing in specific niches or genres, may not have a wide online presence yet.
If you can provide more information, such as the genre of their work, or any specific titles you remember, it might be easier to find information about them.