The Punisher was conceived of by Gerry Conway, then-writer of "The Amazing Spider-Man", inspired by "The Executioner", a popular book series created by author Don Pendleton, in which a Vietnam veteran, Mack Bolan, becomes a serial killer of criminals after the Mafia-related deaths of his family. Conway described the inspiration in an interview from 1987: "I was fascinated by the Don Pendleton Executioner character, which was fairly popular at the time, and I wanted to do something that was inspired by that, although not to my mind a copy of it. And while I was doing the Jackal storyline, the opportunity came for a character who would be used by the Jackal to make Spider-Man's life miserable. The Punisher seemed to fit."