Yes, the first four issues are now available as a graphic novel through IndyPlanet and Drive Thru Comics.
Plus, it's a damn good novel anyway.Or as pal Mike puts it:
The Story: Meet Bernard Campion - 'BC' - visiting Lunar Prime, the neutral city on the Moon, on a mission - assassinate the Governor! If he's successful the reverberations will effect the survival of the entire human race... It's 2109 - BC is trying to take care of “business” during an out of control interplanetary war between The UTZ - Universal Trade Zone - the commercial power of Earth - and the UIN - the Universal Islamic Nation - based on Mars. BC poses as a priest but he's really an assassin for the Pope of the New catholic Church!
So if the harsh winter has you wanting a good read, pick up Vatican Assassin. You'll thank me later.