Penance - Relentless (2008)

Collects Penance: Relentless #1-5.
From the pages of CIVIL WAR: FRONT LINE and THUNDERBOLTS! Once he was a hero, now only a shell of Robbie Baldwin remains. As Penance, he begins a slow descent into madness: the most hated man in America, blamed for the disaster at Stamford, tortured by visions of his failure and obsessed with strange, seemingly meaningless numbers. A relentless pursuit begins...