In the Balance (Worldwar Series, Volume 1)

War on earth erupted in every corner of the globe. Then the real enemy came. Inhuman invaders who were unstoppable, their technology far beyond our reach, their simple goal to claim Earth for the Empire. Here is a saga that covers all the Earth, and beyond, as mankind--in all its folly and glory--faces the ultimate threat; a turning point in history shows us a past that never was and a future that could yet come to be....