Researcher Lyra travels to Thalassa to study mermaid courtship—but accidentally teaches an extinct siren how to claim her. Jasper can slaughter thirty killer whales, tear through steel, and hunt anyone who tries to escape him. After Lyra rejects him, he chains her in a cave and forces her to swallow a pearl made from his heart’s blood. Her body begins changing: gills open, wounds heal, and raw flesh becomes irresistible. Then Lyra discovers the monster is the boy who saved her as a child—and wai
