From audible.com:

Moon has spent his life hiding what he is - a shape-shifter able to transform himself into a winged creature of flight. An orphan with only vague memories of his own kind, Moon tries to fit in among the tribes of his river valley, with mixed success. Just as Moon is once again cast out by his adopted tribe, he discovers a shape-shifter like himself... someone who seems to know exactly what he is, who promises that Moon will be welcomed into his community.

What this stranger doesn't tell Moon is that his presence will tip the balance of power... that his extraordinary lineage is crucial to the colony's survival... and that his people face extinction at the hands of the dreaded Fell! Now Moon must overcome a lifetime of conditioning in order to save himself - and his newfound kin.

From audible.com:

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.

From audible.com:

All his life, Moon roamed the Three Worlds, a solitary wanderer forced to hide his true nature - until he was reunited with his own kind, the Raksura, and found a new life as consort to Jade, sister queen of the Indigo Cloud court. But now a rival court has laid claim to him, and Jade may or may not be willing to fight for him. Beset by doubts, Moon must travel in the company of strangers to a distant realm where he will finally face the forgotten secrets of his past, even as an old enemy returns with a vengeance. The Fell, a vicious race of shape-shifting predators, menaces groundlings and Raksura alike. Determined to crossbreed with the Raksura for arcane purposes, they are driven by an ancient voice that cries out from… The Siren Depths.

From audible.com:

In "The Falling World", Jade, sister queen of the Indigo Cloud Court, has traveled with Chime and Balm to another Raksuran court. When she fails to return, her consort, Moon, along with Stone and a party of warriors and hunters, must track them down. Finding them turns out to be the easy part; freeing them from an ancient trap hidden in the depths of the Reaches is much more difficult. "The Tale of Indigo and Cloud" explores the history of the Indigo Cloud Court, long before Moon was born. In the distant past, Indigo stole Cloud from Emerald Twilight. But in doing so, the reigning Queen Cerise and Indigo are now poised for a conflict that could spark war throughout all the courts of the Reaches. Stories of Moon and the shape changers of Raksura have delighted listeners for years. This world is a dangerous place full of strange mysteries, where the future can never be taken for granted and must always be fought for with wits and ingenuity, and often tooth and claw. With two brand-new novellas, Martha Wells shows that the world of the Raksura has many more stories to tell....

From audible.com:

Moon, Jade, and other favorites from the Indigo Cloud Court return with two new novellas from Martha Wells.

Martha Wells continues to enthusiastically ignore genre conventions in her exploration of the fascinating world of the Raksura. Her novellas and short stories contain all the elements fans have come to love from the Raksura books: courtly intrigue and politics, unfolding mysteries that reveal an increasingly strange wider world, and threats both mundane and magical.

"The Dead City" is a tale of Moon before he came to the Indigo Court. As Moon is fleeing the ruins of Saraseil, a groundling city destroyed by the Fell, he flies right into another potential disaster when a friendly caravanserai finds itself under attack by a strange force.

In "The Dark Earth Below," Moon and Jade face their biggest adventure yet: their first clutch. But even as Moon tries to prepare for impending fatherhood, members of the Kek village in the colony tree's roots go missing, and searching for them only leads to more mysteries as the court is stalked by an unknown enemy.

Stories of Moon and the shape changers of Raksura have delighted readers and listeners for years. This world is a dangerous place full of strange mysteries, where the future can never be taken for granted and must always be fought for with wits and ingenuity, and often tooth and claw. With these two new novellas, Martha Wells shows that the world of the Raksura has many more stories to tell.

From audible.com:

An expedition of groundlings from the Empire of Kish have traveled through the Three Worlds to the Indigo Cloud court of the Raksura, shape-shifting creatures of flight that live in large family groups. The groundlings have found a sealed ancient city at the edge of the shallow seas, near the deeps of the impassable Ocean. They believe it to be the last home of their ancestors and ask for help getting inside. But the Raksura fear it was built by their own distant ancestors, the Forerunners, and the last sealed Forerunner city they encountered was a prison for an unstoppable evil.

Prior to the groundlings' arrival, the Indigo Cloud court had been plagued by visions of a disaster that could destroy all the courts in the Reaches. Now, the court's mentors believe the ancient city is connected to the foretold danger. A small group of warriors, including consort Moon, an orphan new to the colony and the Raksura's idea of family, and sister queen Jade, agree to go with the groundling expedition to investigate. But the predatory Fell have found the city too, and in the race to keep the danger contained, the Raksura may be the ones who inadvertently release it.

The Edge of Worlds, from celebrated fantasy author Martha Wells, returns to the fascinating world of The Cloud Roads for the first book in a new series of strange lands, uncanny beings, dead cities, and ancient danger.

From audible.com:

A former friend has betrayed the Raksura and their groundling companions, and now the survivors must race across the Three Worlds to rescue their kidnapped family members. When Moon and Stone are sent ahead to scout, they quickly encounter an unexpected and potentially deadly ally, and decide to disobey the queens and continue the search alone. Following in a wind-ship, Jade and Malachite make an unlikely alliance of their own, until word reaches them that the Fell are massing for an attack on the Reaches, and that forces of the powerful Empire of Kish are turning against the Raksura and their groundling comrades.

But there may be no time to stage a rescue, as the kidnapped Raksura discover that their captors are heading toward a mysterious destination with a stolen magical artifact that will cause more devastation for the Reaches than anything the lethal Fell can imagine. To stop them, the Raksura will have to take the ultimate risk and follow them into forbidden territory.

The Harbors of the Sun, from celebrated fantasy author Martha Wells, is the thrilling follow-up to The Edge of Worlds, and the conclusion of a new Three Worlds duology of strange lands, uncanny beings, dead cities, and ancient danger.