Moon, once a solitary wanderer, has become consort to Jade, sister queen of the Indigo Cloud court. Together, they travel with their people on a pair of flying ships in hopes of finding a new home for their colony. Moon finally feels like he's found a tribe where he belongs. But when the travelers reach the ancestral home of Indigo Cloud, shrouded within the trunk of a mountain-sized tree, they discover a blight infecting its core. Nearby they find the remains of the invaders who may be responsible, as well as evidence of a devastating theft. This discovery sends Moon and the hunters of Indigo Cloud on a quest for the heartstone of the tree -- a quest that will lead them far away, across the Serpent Sea. In this followup to The Cloud Roads, Martha Wells returns with a world-spanning odyssey, a mystery that only provokes more questions -- and the adventure of a lifetime. Skyhorse Publishing, under our Night Shade and Talos imprints, is proud to publish a broad range of titles for readers interested in science fiction (space opera, time travel, hard SF, alien invasion, near-future dystopia), fantasy (grimdark, sword and sorcery, contemporary urban fantasy, steampunk, alternative history), and horror (zombies, vampires, and the occult and supernatural), and much more. While not every title we publish becomes a New York Times bestseller, a national bestseller, or a Hugo or Nebula award-winner, we are committed to publishing quality books from a diverse group of authors.