The Advanced Guard

While it seemed long and drawn out in a few places, it was put into context so that you can understand why it had to be that bland in places. The aliens were searching for a world to use the bodies for own shells. Each world they destroyed supplied the bodies they needed to survive. They could not stay in their own bodies for long. The use of the new bodies was normally only a year long. Their bodies used the energy in their new bodies so that they would have to recharge their new bodies on a daily basis. The signs of courage, caring and self sacrifice demonstrated by the earthlings was the cause for the saving of the earth. Kept you wondering what was going to happen next and which of the alien examiners would win, the good or the bad.