Well, without having read the 'jet a marked man novel', it's hard to say precisely. But generally, if a man is'marked' in a novel, it often implies that he has something special or different about him that sets him apart from others in the story. It could be a physical mark, a reputation, or some sort of fate that he has to face. Maybe the story is about his adventures in a world that views him as this marked individual, with all the challenges and opportunities that come with it.
Since I'm not familiar with the 'jet a marked man novel', we can only make some general assumptions. The title makes it seem like the main focus is on a man who is marked. This mark could be a symbol of his past deeds, good or bad. It might lead to him being chased or revered by different characters in the novel. The story could be a thriller, with the man constantly on the run from those who want to harm him because of this mark. Or it could be a more character - driven story, exploring how this marked status affects his relationships, self - identity, and his view of the world around him.
I'm not sure specifically as I haven't read this 'jet a marked man novel'. It could be about a man who is marked in some way, perhaps targeted or singled out, and the story might revolve around his journey, struggles, and attempts to deal with this marked status.