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The Lunar Observatory on earth is picking up a very strange and unidentifiable signal from the direction of Cygnus. When the meaning of this signal is finally understood, it clearly spells disaster for earth. 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. As it moves close the humans can discern that it is an enormous convoy of some sort, nearly as large as a planet. And 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?
Reviews with the most likes.
A really interesting book. When I read SF, I'm looking for big ideas and action, not so much character development and relationship subtleties. So this was right up my alley.
Long detailed discussions on relativistic physics and exobiology.
Plenty of action.
The politics of US and China relationships are kind of dated since the book was written in the late 1970s.
I also think it was a bit long.
So I recommend it.