Another theme could be beauty and darkness. The black water lilies themselves are a symbol of this. They are beautiful yet have an air of darkness around them, which might reflect on the characters and their secrets in the novel.
There is often a central female character. She might be the one who has a deep connection with the black water lilies and is at the heart of many of the novel's events.
There could be a character who is an artist. Since water lilies are often a subject of art, an artist character might be interested in painting the black water lilies. This artist could be one of the main characters, and through their eyes, we could see the beauty and mystery of the lilies and the surrounding area. There might also be a local villager who has a deep knowledge of the lore and history related to the water lilies, and their interactions with other characters could drive the story forward.
I'm not sure specifically as I haven't read it. But it might be about the water lilies in India, perhaps their growth, their significance in the Indian ecosystem or culture.
Without having read the novel, it's difficult to say precisely. However, many novels explore the human condition. It could be about a character facing moral dilemmas, or it could be a story of social change and how the characters are affected by it. It might also be a fictional account of historical events, with the author adding their own creative twists to make it more engaging for the readers.
I don't have enough information to determine the author of the 'black water novel'. There are so many novels out there, and without more context, it's difficult to say who wrote it.
Since we don't have more details about this 'black water novel', it could be a work of fiction that uses 'black water' as a symbol. It could represent darkness, the unknown, or something menacing. The story might follow characters who are either trying to understand the significance of this black water or are directly affected by it. Maybe it's a psychological thriller where the black water has some sort of power over the minds of the characters, leading them into a web of mystery and danger.