The third title in a reissue of classic science fiction adventures by bestselling author Donald Moffitt!
The Lunar Observatory on Earth is picking up a very strange and unidentifiable signal from the direction of Cygnus. An immense object is rushing towards the Solar System, traveling nearly at the speed of light, its intense nuclear radiation sure to kill all life on Earth within months. There is nothing anyone can do to divert such an enormous alien object. Then, unexpectedly, the object changes course and heads toward the dead planet of Jupiter-but what could an enormous alien convoy want with such a useless planet?
