Written by Kaare Andrews, Olivier Coipel, Warren Ellis. You met Subject X in the pages of ASTONISHING X-MEN. But what was he really doing and who he was doing it for? Find our in the second issue of this special 2-issue tie-in series to Warren Ellis and Simone Bianchi's opening salvo on Astonishing X-Men! Ghost Boxes is about the real stakes of the Ghost Boxes storyline, and what will happen if the X-Men fail to solve that mystery. Rated T+