In a world where humanity lives in the sky to escape a deadly mist below, Cass’s only goal is survival. That is, until she finds a job on the airship Daedalus as a diver. Now she explores ruined cities, looking for treasure and people’s lost heirlooms until a young man hires her to find the impossible: a way to eradicate the Mist.

Matt Cruse is a cabin boy on the Aurora, a huge airship that sails hundreds of feet above the ocean. One night he meets a dying balloonist who speaks of beautiful creatures drifting through the skies. It is only after Matt meets the balloonist's granddaughter that he realizes that the man's ravings may, in fact, have been true, and that the creatures are completely real and utterly mysterious.

A team of unlikely friends - an orphaned street musician, a hard-working girl from the tenements, and a talented clockmaker's apprentice - discover that together they can overcome even the darkest of fears.

In the post-apocalyptic, neo-medieval city of Ark, speech is constrained to 500 sanctioned words. If somewhere were to speak outside that approved lexicon, they'd face banishment. The only exceptions to this rule are the Wordsmith and his apprentice, Letta. Together, they are the keepers and archivists of all language. But when Letta's master dies, she is suddenly promoted to Wordsmith and finds the situation more complicated than she knew.

When Rose first met Charles, he was trapped in the form of a white bear. To rescue him, Rose traveled to the land that lay east of the sun and west of the moon to defeat the evil Troll Queen. Now, Rose has found her happily ever after with Charles - until a sudden storm destroys his ship and he is presumed dead. But Rose doesn’t believe the shipwreck was an act of nature, nor does she believe Charles is truly dead. Something much more sinister is at work.

Beneath the Ocean of Sky, heroes will rise. Samra Rose is in trouble. Living in a colony floating high above the clouds, she's been far away from anything resembling an adventure, but when aerial raiders carry off her home - with her inside - she gets more excitement than she ever wished for. Her best friend, Kipling, and a Grounder boy with a skyship will take to the air in pursuit, but all three will face dangers they've never imagined.

Twelve-year-old Mary Hayes can't stand her orphanage. But when an attempted escape doesn't go quite as well as she'd hoped, Mary fears she'll be stuck in the Buffalo Asylum for Young Ladies forever. The very next day, a mysterious woman named Madame Z appears at the orphanage requesting to adopt Mary. The matron's all too happy to get the girl off her hands. Soon Mary is fed a hearty meal, dressed in a clean, new nightgown, and shown to a soft bed with blankets piled high.

When Kara Westfall was six years old, her mother was convicted of the worst of all crimes: Witchcraft. Years later, Kara and her little brother, Taff, are still shunned by the people of their village, who believe that nothing is more evil than magic…except, perhaps, the mysterious forest that covers nearly the entire island. It has many names, this place. Sometimes it is called the Dark Wood, or Sordyr's Realm. But mostly it's called the Thickety.

Violet, born and raised in the Marsh, has been trained as a surrogate for the royalty - because in the Jewel the only thing more important than opulence is offspring. Purchased at the surrogacy auction by the Duchess of the Lake and greeted with a slap to the face, Violet (now known only as #197) quickly learns of the brutal truths that lie beneath the Jewel's glittering facade.

As assistant to Mangkon’s most celebrated mapmaker, twelve-year-old Sai plays the part of a well-bred young lady with a glittering future. In reality, her father is a conman—and in a kingdom where the status of one’s ancestors dictates their social position, the truth could ruin her. Sai seizes the chance to join an expedition to chart the southern seas, but she isn’t the only one aboard with secrets. When Sai learns that the ship might be heading for the fabled Sunderlands—a land of dragons, dangers, and riches beyond imagining—she must weigh the cost of her dreams.

After escaping a harsh school where punishment was the lesson of the day, 17-year-old Louisa Ditton is thrilled to find employment as a maid at a boardinghouse. But soon after her arrival at Coldthistle House, Louisa begins to realize that the house's mysterious owner, Mr. Morningside, is providing much more than lodging for his guests. Far from a place of rest, the house is a place of judgment, and Mr. Morningside and his unusual staff are meant to execute their own justice on those who are past being saved.

There came an elastic aftershock of creaks and groans and then, softly softly, a chinking shower of rubbled cement. Leaves calmed and trunks stood serene. Where, not a minute before, there had been a suburb, there was now only woodland standing amid ruins. There is no warning. No chance to prepare. They arrive in the night: thundering up through the ground, transforming streets and towns into shadowy forest. Buildings are destroyed.

In the middle of America, Amy Lewis is on her way to her grandma's house. She's being chased by a very bad wolf. Galaxies away, Loki is waking up in a prison cell, strangely without a hangover and with no idea what he's done wrong - this time, anyway. But he does know that Thor is hiding something, Odin is up to something wicked, and there seems to be something that he's forgotten....

For nearly a century, Victorian London relied on “climbing boys” - orphans owned by chimney sweeps - to clean flues and protect homes from fire. The work was hard, thankless, and brutally dangerous. Eleven-year-old Nan Sparrow is quite possibly the best climber who ever lived - and a girl. But when Nan gets stuck in a deadly chimney fire, she fears her time has come. Instead, she wakes to find herself in an abandoned attic. And she is not alone. Huddled in the corner is a mysterious creature - a golem - made from ash and coal. This is the creature that saved her from the fire.

For her 16th birthday, Vaela Sun receives the most coveted gift in all the Spire - a trip to the Continent. It seems an unlikely destination for a holiday: a cold, desolate land where two nations remain perpetually locked in combat. Most citizens lucky enough to tour the Continent do so to observe the spectacle and violence of battle, a thing long vanished in the peaceful realm of the Spire.