Your Heart Belongs to Me is a novel by science fiction/horror writer Dean Koontz. The plot revolves around Ryan Perry, who receives a heart transplant. From the #1 New York Times bestselling master of suspense comes a riveting thriller that probes the deepest terrors of the human psyche—and the ineffable mystery of what truly makes us who we are. Here a brilliant young man finds himself fighting for his very existence in a battle that starts with the most frightening words of all… And she’s come to take it back.