Essef - Earth against the alien unknown... a.k.a. Earth Factor X. Reality twisted... slightly. Earth shivered in a momentary absence of vibration. For a split second the solar system wasn"t. And then was again. Less than a billionth of a second... but a time shift occurred for connected persons. As the shadow ship started to emerge from the time jump, men and aliens were locked in a secret, undeclared war to rule Earth.