Murder at the Mars Club

From the Murder on Mars Series: The Mars Club was the sanctuary of the rich and powerful on Mars; a place seemingly more at home in 1920's London than the Mars of the late 21st century. Access to the little luxuries and privacy are its main attractions, so when one of the members is found dead over port and a cigar, Chief Inspector McKernan is called in to resolve the case as quickly and discretely as possible. Unfortunately, his investigation soon reveals that everyone in the Club that night might have committed the crime. Most of the evidence he uncovers is circumstantial, but much of it points in one direction. Will the solution of the case prove to be the one man McKernan would least care to implicate?