It's possible that:
* The name is misspelled. Double check the spelling and try searching again.
* It's a pseudonym. There could be an author who uses "C Rozan" as a pen name.
* It's a newer or lesser-known author. Authors with unique names can be harder to find.
To help me find the author you're looking for, could you please provide:
* Any other details about the author? Like their full name, any books you know they've written, or what genre they write in.
* Any other information about the books? Like the book's title, publication year, or anything that stands out to you.
With more information, I'll be able to help you track down the author and their works.