The primary concept of Captain William Carter’s entrance into the weird world was when he was touched by the otherworld after crossing the Delaware in 1776. He got bit by a Hessian vampire and doesn’t age any more. He doesn’t know why. All he knows is that he doesn’t age, and he’s a fair bit tougher than the average human. Not invulnerable. Just hardier and quicker to heal. Pretty much the same as Jack Hart some centuries later. There’s got to be a reason why your action heroes take wounds that would cripple or hobble a real living man and just walk them off, right? Your typical action hero from movies would spend weeks or months recovering. I want to write another story for the next day. So I write characters that can do that. And then I shoot them. Or stab them. Or get them into crashes that fracture every bone in their body. Sometimes a lot.

That is where Captain William Carter comes from. I wanted someone better than human but still realistic. Still human, but better than most, a hero I could write, without having him age out or get crippled. I was going to put him through a lot of hells and he needed to be able to survive them. That is where William Carter comes from.