A collection of books 4, 5 and 6 in the Stone Soldiers series.
(#4 SHADES OF WAR) When a shadowy figure begins raising a spectral army from Civil War battlefields, it's up to America's supersoldiers to stop an enemy that is already dead.
(#5 BLACK KNIGHT DOWN) A prehistoric, artificial satellite of unknown origin comes crashing to earth, brought down by a coven of witches intent on unleashing its secrets. Can the stone soldiers stop the witches in time, or will they face an older and deadlier threat than ever before?
(#6 ARMAGEDDON Z) It's the end of the world as the dead rise up to attack the living. For one young psychic, the horrible apocalypse keeps happening over and over, no matter how many times he dies. Can he warn the Stone Soldiers in time to prevent the awful future he is trapped repeating, or is this truly the end?