The Sign of the Mute Medusa
(1977)(A book in the St. Cyr Interplanetary Detective Mysteries series)
A novel by Ian Wallace
Envoys from Earth: The two of them were hand picked for the mission to the distant planet of Turquoise. Detective Captain St. Cyr combined in a unique way the qualities of lightning fast intelligence of dazzling inborn intuition. Detective Lieutenant U. Tuli was unsurpassed in her blending of computer-like logical abilities and almost religious devotion to duty. Now both of them were heading for the most disturbing trouble spot in the galaxy - to deal with a dark threat to the perfect harmony of the interplanetary confederation.
Used availability for Ian Wallace's The Sign of the Mute Medusa