Graphic novel star Kazu Kibuishi creates a world of terrible, man\-eating demons, a mechanical rabbit, a giant robot\-\-\-and two ordinary children on a life\-or\-death mission. After the tragic death of their father, Emily and Navin move with their mother to the home of her deceased great\-grandfather, but the strange house proves to be dangerous. Before long, a sinister creature lures the kids' mom through a door in the basement. Em and Navin, desperate not to lose her, follow her into an underground world inhabited by demons, robots, and talking animals. Eventually, they enlist the help of a small mechanical rabbit named Miskit. Together with Miskit, they face the most terrifying monster of all, and Em finally has the chance to save someone she loves.

A MYSTERIOUS WORLD FULL OF NEW ALLIES... AND OLD ENEMIES! Emily and Navin's mother is still in a coma from the arachnopod's poison, and there's only one place to find help: Kanalis, the bustling, beautiful city of waterfalls. But when Em, her brother, and Miskit and the rest of the robotic crew aboard the walking house reach the city, they quickly realize that seeking help is looking for trouble...dangerous trouble.

AN IMPOSSIBLE JOURNEY WITH DANGER AT EVERY TURN... Emily, Navin, and their crew of resistance fighters charter an airship and set off in search of the lost city of Cielis. There they hope to find help from the Guardian Council's powerful Stonekeepers. It's a mission that Alledia's survival depends on, and time is running out—Emily's got to find Cielis before the Elf King finds her.

A FALLEN CITY WHERE TERRIBLE SECRETS ARE REVEALED... Emily and her friends think they'll find the help they need in Cielis, but something isn't right. Streets that were once busy are deserted, and the townspeople who are left live in fear. Emily is soon escorted to the Academy, where she's expected to compete for a spot on the Guardian Council, a group of the most powerful Stonekeepers. But as the number of competitors gets smaller and smaller, an awful secret is slowly uncovered—a secret that, if left buried, means the certain destruction of everything Emily fights for.

THE ENEMY GROWS STRONGER.... Emily survived the chaos of the Guardian Academy, but Max Griffin has stolen the Mother Stone. With it, the Elf King forges new Amulets that will give him the power to invade and destroy the nation of Windsor. Emily and her friends lead the soldiers of the Cielis Guard in a fight to stop him, but Max stands in their way. And when she seeks information from the Voice of her Amulet, she discovers that the Voice is much more sinister than she ever could have imagined.

A WORTHY MISSION...OR A TRAP? Navin and his classmates journey to Lucien, a city ravaged by war and plagued by mysterious creatures, where they search for a beacon essential to their fight against the Elf King. Meanwhile, Emily heads back into the Void with Max, one of the Elf King's loyal followers, where she learns his darkest secrets. The stakes, for both Emily and Navin, are higher than ever.

Emily, Trellis, and Vigo visit Algos Island, where they can access and enter lost memories. They're hoping to uncover the events of Trellis' mysterious childhood \-\- knowledge they can use against the Elf King. What they discover is a dark secret that changes everything. Meanwhile, the Voice of Emily's Amulet is getting stronger, and threatens to overtake her completely.

Emily has lost control of her Amulet and is imprisoned in the Void, where she must find a way to escape the influence of the Voice. Meanwhile, Emily's brother, Navin, travels to Lighthouse One, a space station where the Resistance is preparing to battle the approaching Shadow forces that would drain planet Alledia of all its resources. Emily and Navin must be smarter and stronger than ever to ensure Alledia's survival.

The highly anticipated, thrilling conclusion to Kazu Kibuishi's \#1 New York Times bestselling series! After her confrontation with Ikol, Emily finally understands the stone's power and what she must do to defend Alledia from the shadows. As she travels to Typhon to help her mom and Navin, Prince Trellis returns to the Kingdom of the Elves to save his countrymen \-\- and confront the fraud who has seized power in the absence of a king. The threat of darkness follows all Stonekeepers closely, and it will take the strength of both new friends and old foes to conquer it... and survive.