It's possible that:
* The name is misspelled: Perhaps there is a similar name you're thinking of.
* The author is relatively unknown: There might be a less famous author named Titus Foster. If you have any more information about their work, like genre or a specific book title, it would be helpful.
* The author is fictional: It's possible the name belongs to a character in a book, movie, or other form of media.
Please provide more details if you can, and I'll do my best to help you find the author you're looking for!