I'm not sure specifically as there could be many novels with this name. It might be about a large sum of money or treasure related to a king, perhaps a story of ransom demands for a king or something associated with a king's wealth.
Since I don't know the exact 'king's ransom novel', I can't say for sure. But it might have a king as one of the main characters, and perhaps a villain who demands the ransom.
In fact, 'A Warden's Ransom' has roots in a true story. The characters and situations might have been fictionalized to some extent for dramatic effect, but the core elements are based on reality.
There could be a scientist character who is trying to study Alexandria's genesis. This character might be fascinated by the genetic anomaly and wants to understand it better. They could play a crucial role in either helping or hindering the characters with the genesis, depending on their motives. Maybe they see it as a way to gain fame and fortune, or perhaps they truly want to help the 'affected' individuals.
I'm not sure specifically as there could be many novels related to Alexandria. It might be about the historical city of Alexandria, perhaps its rich culture, architecture, or the people who lived there.
Xiren's act of using the ransom to test Baoyu could be understood as her attempt to test Baoyu's feelings and her position in Baoyu's heart. By bringing up the topic of redemption, Xiren hoped to understand Baoyu's true feelings for her and confirm her importance in Baoyu's heart. After Xiren offered to redeem himself, Baoyu expressed his desire to keep her and kept asking her to stay, even asking the old lady for help. These reactions made Xiren clear that she was irreplaceable in Baoyu's heart, thus confirming her choice. Xiren hoped to stay in the Jia residence to clear the obstacles to her goal, realize her wish, and pave the way for herself to become Baoyu's aunt. Although Xiren and Baoyu had gone overboard, if Baoyu's position for Xiren disappeared in the future, or if he did not care about Xiren like Jia Huan did for Caixia and gave up Xiren at will, Xiren would not firmly refuse her mother and brother's proposal.
I'm not sure if 'ransom romance novels' are popular. It's not a very common type that you hear about often in mainstream romance literature. However, there could be a niche audience for it if the concept is well - executed.
A 'ransom romance novel' could be a rather unusual term. It might refer to a romance novel where there is a theme of ransom involved in the plot, like one of the characters is held for ransom and the love story unfolds around this situation.