Twenty Thousand Leagues Under the Sea meetsFrankenstein in Frances Hardinge's latest fantasyadventureThe gods are dead. Decades ago, they turned on one another andtore each other apart. Nobody knows why. But are they really goneforever? When 15-year-old Hark finds the still-beating heart of aterrifying deity, he risks everything to keep it out of the handsof smugglers, military scientists, and a secret fanatical cult sothat he can use it to save the life of his best friend, Jelt. Butwith the heart, Jelt gradually and eerily transforms. How longshould Hark stay loyal to his friend when he's becoming a monsterand what is Hark willing to sacrifice to save him?