Humankind's first extraterrestrial contact is not friendly, and the human species is not prepared. But, thanks to the extraordinary talents of a gifted physicist, mankind is able to repel repeated attacks by a desperate alien antagonist. However, the victorious humans find themselves in a predicament that nearly results in the extinction of the entire human species as they attempt to colonize a distant planet, and that menace finds its way back to Earth's space. Get the boxed set and save the cost of one of the books from the series.