Arthur and Maudie Brightstorm are back home in Lontown after their exhilarating—and secret—adventures in Erythea. Maudie’s sky-ak invention is a hit and Harriet Culpepper has just announced that she will freely share her skyship’s hydroelectric technology. Even Eudora Vane seems to have softened

toward them now that her memory has been erased.

Still, tensions are brewing. The existence of super-sapient creatures on other continents threatens how some Explorers see themselves in the natural order of the world. When Arthur and Maudie begin hearing a strange song summoning them north—a song only they can hear—they know there’s an adventure waiting

for them that may change the lives of everyone in the Wide.

But the Aurora’s not the only skyship journeying northward to uncover the region’s secrets. The North holds answers to the twins’ family history and is home to another legendary super-sapient creature: the earth-bear. And there is someone who will stop at nothing to destroy the Brightstorm name, someone

who is not above exploiting any person or creature to ensure her success.

Return to Vashti Hardy’s “marvelously imagined” world (Publishers Weekly) in this sweeping and propulsive conclusion to the Brightstorm Twins trilogy.