Hey, let me recommend you a few novels that are similar to the Four Princesses of the Cold-Blooded Killer! 1. " The Emperor Loves the Loser Concubine " was also an ancient romance novel. The female protagonist was also a cold-blooded killer, but she had transmigrated to become the daughter of a loser. Let's see how she would turn the tables. 2. " Concubine: Arrogant Charming the World " was also an ancient romance novel. The female protagonist was a useless princess, but at night, she transformed into the leader of a terrifying assassin organization and became the arrogant queen of the world. 3. " The Gorgeous Concubine " was also an ancient romance novel. The female protagonist was also a cold-blooded killer. She transmigrated to become the eldest daughter of the Marquis's family and started a love-hate relationship with the Evil Emperor. I hope you will like my recommendation. If you need anything else, you can continue to ask me!😘