It's possible you are thinking of:
* Roger Federer: A famous Swiss professional tennis player, but he is not an author.
* Walter T. Federer: It's possible this is a less known author. To find out what he wrote, you would need to provide more context, such as:
* The subject of the book: Is it fiction, non-fiction, about a specific topic?
* The approximate time period: When was the book published?
* Any other details: Is there a title, publisher, or anything else you remember about the book?
With more information, I might be able to help you find the author and their works.