* The name is misspelled. Perhaps you're thinking of a different author with a similar name.
* The author is less well-known. There may be authors named Jack Yaeger who have written books, but they haven't gained mainstream recognition.
* The author is an unpublished writer. Some people write books without seeking publication.
To help me figure out who you're looking for, could you please provide more information? For example:
* Any other details about the author: Do you know their genre, approximate year of publication, or any titles they might have written?
* Where did you encounter this name? Was it in a book, a website, or somewhere else?
With more context, I might be able to identify the author you're looking for.