Shadow

Though to the media, the FBI, and a hundred police agencies he was The New Jersey Devil, The Steel Samurai, The Saint Louis Slaughter, and dozens more. These stories are the tales of how Sean learned discipline and the martial arts skills that have served him so well: from his time in college, where a series of accidents leads to him finding his sensei, to his life at Boston Implantables as one of their most gifted and inspired engineers, to becoming one of the more successful serial killers of the superhero era. The tell the story of how he honed his hunting skills while growing his rare gift, up until that fateful moment where a not-so-innocent secretary convinces him to change his ways. This collection is divided into three sections. The first covers his college days, where he learns how to use his gifts. The second is his time living in Boston, where he slowly begins to follow the path of most avengers into darker and darker behavior. The third are a few bonus stories.

Please note: the college stories that you'll hear in Into the Dark were originally published in print under the title Shadow at College. While not all that explicit, a lot of people die in this book, and Sean (aka Shadow) kills most of them.