The Grassleye Mystery Author:E. Phillips Oppenheim E. Phillips Oppenheim, Prince of Story Tellers — the best-selling British author, E. Phillips Oppenheim (1866-1946). Oppenheim published over 150 books and countless magazine stories between 1884 and 1946. While most often identified as a mystery writer, Oppenheim's novels range from spy thrillers to romance. All of them have, however, an und... more »ertone of intrigue. Several of his books were published under the pseudonym, Anthony Partridge.