Nah, really great artist named Federico De Luca did the art/colors. Another guy, ET Dollman, did the letters. The credits are all there on the third page.
I asked that the main detective be African American and that Cain be ethnically ambiguous, but the rest was all artistic choice. Went off beautifully, though.
More a done-in-one just because of schedules and what not, but would be down to do more if some publisher asked.