There are several possibilities:
* Typo: Did you perhaps mean another author?
* Specific niche: Perhaps Richard H. Shriver has published in a very specific field, making him less well-known overall.
* Misremembered name: Sometimes we misremember names. Could there be a different author you're thinking of?
To help me find the right author, please provide more information:
* What kind of books do you think they wrote? (e.g., fiction, non-fiction, historical, etc.)
* Do you remember any book titles or subjects?
* Do you know anything about their background or profession?
With more details, I can try to find the correct author for you.