* The name is misspelled. Perhaps you are thinking of a different author with a similar name.
* The author is not well-known. It is possible that this author has written works that are not widely published or are only available in specific niches.
* The author uses a pseudonym. It's possible that Richard B Pilgrim is a pen name, and the author's real identity is unknown or not publicly revealed.
To find out more, you could try searching online databases such as:
* Library of Congress: [https://www.loc.gov/](https://www.loc.gov/)
* WorldCat: [https://www.worldcat.org/](https://www.worldcat.org/)
* Goodreads: [https://www.goodreads.com/](https://www.goodreads.com/)
You could also try searching for the author's name on specific literary websites or forums.