Death on Monte Mario Hill

Mind-boggling puzzles pursue special agent Drongo even on vacation… While relaxing in Italy, he inadvertently becomes the main witness in the case of the double murder of a prominent businessman and his wife, which took place at a private party. Attempting to track down the killer, Drongo realizes that it could be any of the invitees, while the guests show no obvious motives for the crime. And the detective draws a conclusion that seems completely unbelievable and even shocking to the party participants…