This is the second in the Moon Singer series featuring “Maelen”, the former moon singer of the primitive planet mythical “Thassa”. Also revolving around the cargo apprentice “Krip Vorland’, now in the body of the “Thassa” and the crew of the free-trader “Lydis” who’s sabotaged ship barely survives its landing on a barren and hostile planet. One by one, the crew of the Lydis and in addition to the crew of a legendary “Patrol” scout are taken over by an unknown force also present on the planet. Only “Maelen” now fugitive of “Thassa” remains unaffected by this mysterious mind control. She, along with revived crewmember Vorland pit themselves against the malicious remnants of an ancient “Fore Runner” civilization who’s only motivation is on regaining the power lost to them in ages past at any cost necessary. To these marauders, the only thing other life forms represent to them is a “body” they can occupy to accomplish their goal of universal control of every planet they encounter. Sequel to Moon of Three Rings (http://openlibrary.org/works/OL473429W/Moon_of_Three_Rings)