Ketterdam: a bustling hub of international trade where anything can be had for the right price - and no one knows that better than criminal prodigy Kaz Brekker. Kaz is offered a chance at a deadly heist that could make him rich beyond his wildest dreams. But he can't pull it off alone.

Aren has lived by the rules all his life. He's never questioned it; that's just the way things are. But then his father is executed for treason, and he and his best friend, Cade, are thrown into a prison mine, doomed to work until they drop. Unless they can somehow break free.... But what lies beyond the prison walls is more terrifying still. Rescued by a man who hates him yet is oath-bound to protect him, pursued by inhuman forces, Aren slowly accepts that everything he knew about his world was a lie.

After years of searching for the next Avatar, the four nations have found peace with Avatar Yun - until Kyoshi, Yun’s friend and servant, demonstrates remarkable bending abilities herself. With the identity of the true Avatar at stake, Kyoshi and her fiery friend Rangi flee the Avatar mansion and find supporters in the daofei - outlaws living in the shadows of the Earth Kingdom. But while Kyoshi, Rangi, and their daofei friends face off against underworld rivals, those who seek to control the Avatar draw close.

When the exiled Prince Okisada, the most illustrious prisoner of the penal colony on Sado Island, is poisoned, Akitada is called upon by the emperor's envoys to investigate incognito. Posing as a prisoner, he discovers a deadly conspiracy, only to fall into the hands of brutal guards and disappear. It falls to Tora, Akitada's devoted assistant, to begin his own dangerous search of the island for his lost friend and the truth.

Theirs is a world of opposites. The privileged live in sky manors held aloft by a secretive magic known only as the Mysteries. Below, the earthbound poor are forced into factory work to maintain the engine of commerce. Only the wealthy can afford to learn the Mysteries, and they use their knowledge to further lock their hold on society. Cettie Pratt is a waif doomed to the world below, until an admiral attempts to adopt her. But in her new home in the clouds, not everyone treats her as one of the family.

Fifteen-year-old Tobias Doljan, a Walker trained to travel through time, is called to serve at the court of Daerjen. The sovereign, Mearlan IV, wants him to Walk back 14 years to prevent a devastating war that will destroy all of Islevale. Even though the journey will double Tobias' age, he agrees. But when he arrives, he discovers that Mearlan has already been assassinated, and his court, destroyed. The only survivor is the infant princess. Still a boy inside his newly adult body, Tobias must find a way to protect the princess from assassins and build himself a future...in the past.

Fleeing to London with a witch hunter on her trail, Alyce discovers her own dark magic and lands herself embroiled in the struggle. Alyce's mother has just been burned at the stake for practicing witchcraft. With only a thin set of instructions and a witch’s mommet for guidance, Alyce must face the world that she’s been sealed off from - a world of fear and superstition. With a witch hunter fast on her trail, she’ll need the help of an innkeeper and a boy looking to discover the truth behind his own mother's past.

Saker appears to be a simple priest, but in truth he's a spy for the head of his faith. Wounded in the line of duty by a Lascar sailor's blade, the weapon seems to follow him home. Unable to discard it, nor the sense of responsibility it brings, Saker can only follow its lead. The dagger puts Saker on a journey to distant shores, on a path that will reveal terrible secrets about the empire, about the people he serves, and destroy the life he knows.

In this world, sixteen-year-old Charlotte and her fellow refugees have scraped out an existence on the edge of Britain’s industrial empire. Though they live by the skin of their teeth, they have their health (at least when they can find enough food and avoid the Imperial Labor Gatherers) and each other. When a new exile with no memory of his escape or even his own name seeks shelter in their camp he brings new dangers with him and secrets about the terrible future that awaits all those who have struggled has to live free of the bonds of the empire’s Machineworks.

In 1540, 12-year-old Jahan arrives in Istanbul. As an animal tamer in the sultan's menagerie, he looks after the exceptionally smart elephant Chota and befriends (and falls for) the sultan's beautiful daughter Princess Mihrimah. A palace education leads Jahan to Mimar Sinan, the empire's chief architect, who takes Jahan under his wing as they construct (with Chota's help) some of the most magnificent buildings in history.

In 17th-century London, two forces rule the people: the color powers and the Stone Plague. Brown masks can manipulate wood. Black masks control the night. And red mask...well, red is the color of blood. Thomas Fawkes needs a gray mask so he can remove the stone that has invaded his body and will ultimately take his life. But when he fails his color test, his only hope is to track down his father, the infamous Guy Fawkes, and demand his color mask.

Newbery Medal-winning author Avi completes the Crispin saga with this third installment of the riveting trilogy. In 14th-century England, Crispin has embarked on one adventure after another since discovering that he, once known only as “Asta’s son,” has a much grander future than he ever could have imagined. Encountering such trustworthy souls as Bear during the course of his travels, Crispin teeters on the brink of fulfilling his destiny in this stunning tale of the Middle Ages.

Violin prodigy Etta Spencer had big plans for her future, but a tragedy has put her once-bright career at risk. Closely tied to her musical skill, however, is a mysterious power she doesn't even know she has. When her two talents collide during a stressful performance, Etta is drawn back hundreds of years through time.

Giulia Tofana longs for more responsibility in her mother’s apothecary business, but Mamma has always been secretive and refuses to tell her the hidden keys to her success. But the day Mamma is arrested for the poisoning of the powerful Duke de Verdi, Giulia is shocked to uncover the darker side of her trade. Giulia must run for her life and escapes to Naples, under the shadow of Mount Vesuvius, to the home of her aunt Isabetta, a famous courtesan.

Charlisse Bristol sets off on a voyage in search of a father she never knew, only to become shipwrecked on an island. The last thing Captain Merrick expected to find in the middle of the Caribbean was a beautiful maiden. Now he is burdened with the task of protecting her not only from his crew but from himself. A recent convert to Christianity, Merrick is haunted by a sordid past. Charlisse can make no sense of Captain Merrick. A pirate who prays and drinks rum?