'The Court of St. Simon' is an adventure novel written by E. Phillips Oppenheim. It centers on Monsieur Simon and his consort Josephine. They were members of a society circle often referred to as demi-monde, a world occupied by elite men and the women who entertained them and whom they kept. In the Court of St. Simon, the two become judge, jury, and executioner for the criminal world, punishing those who their contemporaries think are too vile even for them.