As of my last knowledge update in March 2023, S. R. Masters is an author known primarily for his work in the genre of psychological thrillers. His novel "The Killer You Know" is one of his notable works, revolving around a group of friends and a chilling prediction that one of them will become a murderer. It’s a story that blends elements of a coming-of-age tale with suspense and mystery, as the friends reunite years later to confront their past and the truth about the prediction. Unfortunately, detailed biographical information about S. R. Masters, including his background, career, and full body of work, might not be widely publicized, so I can't provide a more comprehensive description. Authors with a smaller or more localized readership can sometimes have less information available online, but it's always worth checking the latest sources or the author's own platform for up-to-date details.