Collects Astonishing X-Men (2004) #25-30, Astonishing X-Men: Ghost Boxes #1-2. The X-Men are back to business -- with a new look, a new base of operations, and a mystery to solve that will take them into previously uncharted territory and test them to their core. It all starts on a spaceship hovering 300 hundred feet above the twisted wreckage of Chaparanga Beach. Its sole inhabitant: the mysterious Subject X.