I'm not sure if it's extremely popular. It might be well - known within certain circles of readers who are into that genre, but it may not have mainstream popularity.
I'm not sure specifically as I haven't read it. But generally, a novel with such a title might be about a powerful figure in the underworld world. It could involve things like power struggles, crime empires, and the character's journey to become or maintain his status as the 'king' in that dark and dangerous realm.
Another option is to check with your local library. Libraries have a diverse selection of books. They can either have it on their shelves or they might be able to order it from another library through inter - library loan systems. So, it's definitely worth giving your local library a try.
One of the great ones is 'The New Adventures in the Kane Chronicles'. It takes the characters on new and exciting quests that feel like they could be part of the original series. Another good one is 'Kane Chronicles: Alternate Endings' which explores different ways the story could have ended. And 'The Kane Chronicles: Extended Tales' gives more backstory to the characters.
Fanfiction can enhance the reading experience in multiple ways. First, it can fill in the gaps that the original books might have left. Maybe there was a side character that you were curious about, and fanfiction can give them a whole new story. Second, it allows for different interpretations of the events in the books. Different fanfic authors might see a scene in a different light and write a story based on that. It also keeps the fandom alive and engaged, making you think more about the world and characters of The Kane Chronicles even after you've finished the books.
The origin of Kate Kane and Jacob Kane varies in different comic interpretations. Kate Kane is known as Batwoman. Her origin often involves her military background and her decision to take on a vigilante role in Gotham. Jacob Kane, her father, is also an important figure in her story. He has his own military and family - related past that intersects with Kate's journey.