What has the author Richard Henry Opper written?

There is no known author named "Richard Henry Opper." There are a few possibilities:

1. Typo: Perhaps you meant a different name, like "Richard Henry Hope" or "Richard Henry O'Brien."

2. Uncommon Name: It's possible this author exists, but is not widely known. You could try searching for their work using specific keywords like "Richard Henry Opper" + "book" or "novel."

3. Non-Author: It's also possible that the name "Richard Henry Opper" refers to someone who is not an author, but a different kind of public figure.

Please check your spelling and provide any additional information you may have to help identify the author you are looking for.