She hacked his heart. He built an AI to find her. It learned to love. Riven Thanatos runs a server full of ghosts and an AI named Eros that’s learning to feel. Belle Rose hacks his system and rewrites his life. When a Twitch stream turns deadly, they build something the world wasn’t ready for: an open-source AI that chooses mercy over logic. What starts as a 0.3% chance becomes the protocol that saves them all. The Rose Cipher is a cyberpunk romance and tech thriller about artificial intelligence, hacking, found family, and the kind of love that patches your broken code. For readers of Blake Crouch, Andy Weir, Black Mirror, and Mr. Robot. Tropes: Hacker romance, AI love story, enemies to lovers, slow burn, neurodivergent MC, found family, technothriller. Love is not an anomaly. Love is the protocol.