About the book: year / A chlorine-breathing ambassador from the Sirius system is found dead in his room in an orbital, multi-atmospheric hotel. He was alone in his room, the door was closed, there were no traces on his body. Peace has been established with the Sirius system, however the Sirians have enormous military power and since the hotel is owned and operated by humans, they gave the human authorities twenty-four hours to explain this situation before declaring war.1. Was he murdered or died from another cause?2. If he was killed, how was he killed, who did it, and what could have been the motive??