In 21st century New York, Katie Berger-Jones-Berg begins seeing people in old-fashioned clothes who have a worrying habit of disappearing. Then she receives a mysterious note and is sent hurtling back through time. In 19th-century London, Queen Victoria is on the throne and England is on the brink of war with Russia. For some reason, everyone's looking to Katie to save the day.

In the nineteenth century, ten-year-old Florence Crutchfield leaves a London orphanage to live with her great-uncle, great-aunt, and sickly cousin James, but she soon realizes the home has another resident, who means to do her and James harm.

Oliver Bennet, trapped by societal expectations to live as female, discovers the possibility of love and freedom when he forms a connection with Darcy, but is faced with the choice of living a secure but inauthentic life or risking everything for true self-expression and love.

A net of shadows begins to tighten around the Shadowhunters of the London Institute. Mortmain plans to use his Infernal Devices, an army of pitiless automatons, to destroy the Shadowhunters. He needs only one last item to complete his plan: he needs Tessa Gray. Charlotte Branwell, head of the London Institute, is desperate to find Mortmain before he strikes. But when Mortmain abducts Tessa, the boys who lay equal claim to her heart, Will and Jem,...

When Clara vanishes after the puppeteer Grisini and two orphaned assistants were at her twelfth birthday party, suspicion of kidnapping chases the trio away from London and soon the two orphans are caught in a trap set by Grisini's ancient rival, a witch with a deadly inheritance to shed before it is too late.

In 1870s London, a young orphan girl becomes the apprentice to a man who traps monsters for a living.

In Victorian London, Albert Garrick, an assassin-for-hire, and his reluctant young apprentice, Riley, are transported via wormhole to modern London, where Riley teams up with a young FBI agent to stop Garrick from returning to his own time and using his newly acquired scientific knowledge and power to change the world forever.

Jem Barbary becomes a bogler's apprentice in 1870's London and gets the fright of his life in a city where science clashes with superstition and monsters lurk in every alley.

In an alternate 1875 England, seventeen-year-old clock mechanic Danny, aided by the boy he loves, must discover who is sabotaging the towers that control the flow of time and stop him or her before it is too late.

In the magical underworld of Victorian London, Tessa Gray has at last found safety with the Shadowhunters. But that safety proves fleeting when rogue forces in the Clave plot to see her protector, Charlotte, replaced as head of the Institute. If Charlotte loses her position, Tessa will be out on the street -- and easy prey for the mysterious Magister, who wants to use Tessa's powers for his own dark ends. With the help of the handsome, self-destructive...