In Isaac Asimov's Lucky Starr and the Big Sun of Mercury (1956, 1972), David "Lucky" Starr and his partner John Bigman Jones are sent to Mercury to investigate sabotage at "Project Light," a scientific endeavor to transmit solar energy through hyperspace. They must identify the saboteur amid a tense atmosphere, which includes a stressed-out lead engineer who appears hostile, the project's political opposition, and strange sightings of "ghosts" in the Mercury landscape. The story is a sci-fi mystery that involves alien threats and sabotage against a project important to the future of Earth's energy. 

1st Signet Printing March 1972 in Mint condition, Unread.