* The name is misspelled: Perhaps the author's name is similar but slightly different.
* The author is niche: The author may be specialized in a specific genre or field, making them less well-known to the general public.
* The author is new: The author may be a newer writer who hasn't yet gained widespread recognition.
To find more information about a potential author named H.W. Riddle, you could try:
* Searching online book databases: Use websites like Goodreads, WorldCat, or Amazon to search for books by that name.
* Checking author directories: Websites like AuthorsDen or The Author's Guild might have listings for authors with that name.
* Looking for publications in specific fields: If you have an idea of the author's genre or area of expertise, you can search for publications in that field.
If you can provide any more details about the author or their work, it will be easier to find information about them.