'Profoundly moving and at the same time wildly inspiring' Rob Delaney

'The best narrative non-fiction I've read in years. Rachel Clarke has written a profound piece of investigative journalism and wrapped it up in poetry' Christie Watson

The first of our organs to form, the last to die, the heart is both a simple pump and the symbol of all that makes us human: as long as it continues to beat, we hope.

One summer day, nine-year-old Keira suffered catastrophic injuries in a car accident. Though her brain and the rest of her body began to shut down, her heart continued to beat. In an act of extraordinary generosity, Keira's parents and siblings agreed that she would have wanted to be an organ donor. Meanwhile nine-year-old Max had been hospitalised for nearly a year with a virus that was causing his young heart to fail. When Max's parents received the call they had been hoping for, they knew it came at a terrible cost to another family.

This is the unforgettable story of how one family's grief transformed into a lifesaving gift. With tremendous compassion and clarity, Dr Rachel Clarke relates the urgent journey of Keira's heart and explores the history of the remarkable medical innovations that made it possible, stretching back over a century and involving the knowledge and dedication not just of surgeons but of countless physicians, immunologists, nurses and scientists.