* The name is misspelled or has a different variation. You might want to double-check the spelling.
* The author might be lesser-known or not widely published. It's possible they have written works that haven't received widespread attention.
* The author might use a pseudonym or pen name.
* The author might not be publicly known.
To help me find information about this author, could you please provide more context:
* What kind of writing are you interested in? (fiction, non-fiction, poetry, etc.)
* Do you know anything else about the author, like their nationality, approximate time period of their writing, or any specific works they might have written?
With more information, I might be able to help you find more about Carl Henry Rathjen.