I'm not sure specifically as I haven't read this novel. It could potentially be about a duchess who has some sort of inclination towards self - destruction or facing dangerous situations that seem like she has a 'death wish'.
It depends on different fan communities. In some niche Batman fan groups, it might be somewhat popular as it offers a darker and more extreme take on the character. However, in the broader Batman fanbase, it may not be as mainstream since it goes against the typical heroic image of Batman.
One possible theme could be self - sacrifice. Batman might have a death wish because he feels that giving his life is the ultimate way to protect Gotham. Another theme could be depression and burnout. After years of fighting crime, he may be so worn down that he no longer values his own life.
It's a story that likely revolves around themes of revenge or a character's strong desire for a particular end, perhaps related to justice in a dark and complex way. However, without reading it in detail, it's hard to be more specific.
It's not a true story. 'Death Wish' is purely a fictional creation that might draw inspiration from various elements but is not rooted in real events. The plot and characters are made up to engage the audience.