In alternate chapters, twelve-year-old Jeremiah, who has a fatal heart condition, and J6, the pig growing the heart that could save his life, give their own perspectives on being a transplant donor and donee. Includes facts about the research project on which the story is based.

"Big Duck likes to boss around her younger brother, Little Duck, and she fancies herself the leader of their trio when joined by their gentle friend Porcupine. Little Duck does not speak yet, but through his expressions and his actions, he shows that he has a better grasp on any situation than his older sister"--