Synopsis: (The Delos Digital book description, translated from Italian:) "A distinguished lady shows up at 221B Baker Street; she fears that her husband wants to kill her, but what apparently seems a trivial case of marital jealousy soon takes on much more sinister and mysterious contours. Who is Olimpia, the strange woman to whom Mr. Moxon has been devoting all his attention for some time? In the end, as often happens, Holmes and Watson will find themselves in front of a corpse: who, or what, reduced it to those conditions?" Suggesting that the sense of the title is "Sherlock Holmes and Moxon's Mistress," in tribute to Ambrose Bierce's SF story "Moxon's Master."