Way out in the furthest part of the known world, a tiny stronghold exists all on its own, cut off from the rest of human-kin by monsters that lurk beneath the Snow Sea. There, a little boy called Ash waits for the return of his parents, singing a forbidden lullaby to remind him of them... and doing his best to avoid his very, VERY grumpy yeti guardian, Tobu. But life is about to get a whole lot more crazy-adventurous for Ash. When a brave rescue attempt reveals he has amazing magical powers, he's whisked aboard the Frostheart, a sleigh packed full of daring explorers who could use his help. But can they help him find his family . . . ?

Nevermoor meets How to Train Your Dragon in the thrilling sequel to Voyage of the Frostheart! Ash and his ragtag crew of misfits aboard the Frostheart sleigh have just pulled into Aurora: the most dazzling city Ash has ever seen. Icy skyscrapers, wondrous new foods, and bustling city folk who barely have the time of day for a smalltown kid like him. That is, until he masters the art of songweaving—the ability control the giant monsters that lurk in the snow beyond city limits. But the real reason Ash came to Aurora is to find his long lost parents. The only token they left him before their disappearance was a lullaby; a map disguised as a song that has led him from landmark to landmark, all in the hopes of finding them at the end of it. With the help of his best friend Lunah, the fast-talking ship's navigator, and his yeti guardian, Tobu, Ash is one step closer to finding the family he's always longed for. He might find, though, that getting what you wished for is more complicated than he imagined, and Ash's world is about to expand in ways he never thought possible.

The bestselling Frostheart trilogy concludes in this epic story of bravery, loyalty and friendship. Ash faces his greatest challenge yet as the evil Wraith leader Shaard unleashes the dreaded Devourer from its centuries-long imprisonment. Only by uniting can the peoples of the Snow Sea hope to stand against the monster's wrath, but as the Devourer targets the stronghold of Aurora, the tribes remain as divided as ever. In a last desperate move, Ash and the crew of the Frostheart journey to the yeti lands, where humans are forbidden, in search for the truth about the Devourer's origins, and the one weakness that may prove its undoing...