Well, it could be that the title is using the idea of a hero being compared to a sandwich in a rather unexpected way. Maybe it's suggesting that heroes are more ordinary or accessible than we might think, like a sandwich which is a common, everyday food.
The 'ain't nothin but' part makes it seem like the author is trying to break down the traditional view of a hero. And when combined with 'a sandwich novel', it could mean that the novel is about deconstructing heroism. It might show that heroism is not about having superhuman abilities or being on a grand, epic quest. Instead, it could be about the small, mundane things that people do, like the simple components of a sandwich coming together to make something satisfying.
I'm not sure specifically as I haven't read it in detail. But generally, a graphic novel often tells a story through a combination of illustrations and text. It might be about some fun adventures, or it could center around interesting characters and their relationships.
Well, in the 'blues ain't no mockingbird story', it could be about the connection between the blues as a cultural expression and the story's message. The blues is known for its rawness and truth - telling. Maybe the story uses the idea that the blues isn't something to be made fun of or misrepresented, similar to how the characters in the story might feel about their own lives and stories not being mocked or misused.
The 'Blues Ain't No Mockingbird' is a powerful short story. It likely explores themes like the dignity of the characters, especially those in a marginalized situation. The title itself might suggest that the blues, which could represent the hardships and pain of the characters, are not to be made fun of or mocked. It may also touch on issues of race and class, as many stories with such titles often do.
It could mean that the person is about to tell a story where they don't conform to the idea of being a 'good girl'. Maybe they've done things that society might not consider proper for a girl who is seen as 'good'.