Hartman was born in Huntsville, Alabama. He graduated from Princeton University, then went on to study at the London School of Economics, then started a PhD in Finance at Duke University. Sometime around his third year of the finance program, he decided to change careers and become a writer.
You Should Meet My Son!, Hartman's first feature film, appeared at LGBT film festivals in 2011 and is slated for DVD release later in the year.
F&SF reviewer Charles de Lint reported that "The Gumshoe, the Witch, and the Virtual Corpse is, like its title, a somewhat busy book, but there's enough payoff in characterization, story and ideas to make the trip through its pages a real pleasure."