Robert Lewis may refer to multiple individuals across various fields, including authors, actors, and experts in different disciplines. Since you're asking for an author, without more specific information, it's challenging to provide an accurate description. However, one notable author by the name of Robert Lewis is known for his work on men's spiritual development and Christian literature. He is the author of the book "Raising a Modern-Day Knight: A Father's Role in Guiding His Son to Authentic Manhood," which outlines a framework for fathers to instill values of chivalry, courage, and character in their sons. If you are referring to another Robert Lewis with a different literary focus, please provide additional context so I can offer a more targeted description.