Didn't see a topic for this, so:
This is a Manga style story written in America about a man named John Parker, who was a bodyguard at the time of Lincoln's Assassination. Witnessing first-hand the death of Lincoln by a hypnotized Booth, he goes to investigate, only to unwittingly release demons on the world.
Now, with the help of Cherokee Bill, a renegade outlaw, he must hunt down and kill these demons, as well as confront the Baker Detective Agency, the people responsible for conjuring the demons in the first place.
I've only found two volumes so far, I suppose it was canceled, but the artwork was decent and the story had real potential. It's a shame it kind of vanished into obscurity.