* The name is misspelled. It's always worth double-checking the spelling to ensure it's correct.
* The author published under a different name. Some authors use pen names or aliases.
* The author is relatively unknown. There are many talented writers who haven't achieved widespread fame.
* The author may be fictional. It's possible the name is part of a creative writing prompt or a fictional world.
If you can provide more context about where you encountered this name, it might help me narrow down the possibilities.