After the death of the uncle who had been his guardian, fourteen-year-old Alex Rider is coerced to continue his uncle's dangerous work for Britain's intelligence agency, MI6.

Reluctant teenage-spy Alex Rider, on a routine mission at the Wimbledon tennis championships, gets caught up in Chinese gangs, illegal nuclear weapons, and the suspect plans of his Russian host, General Sarov.

Sixteen-year-old Tessa Gray travels to England in search of her brother only to be abducted by the Dark Sisters, residents of London's Downworld, home to the city's supernatural folk, and she becomes the object of much attention--both good and bad--when it is discovered she has the power to transform at will into another person.

Sixteen-year-old Gwyneth Shepherd unexpectedly travels through time to the eighteenth century, and she must find out why her mother lied about her date of birth to hide her ability, research her history, and work with Gideon, another time traveler.

As the Council attempts to strip Charlotte of her power, sixteen-year-old orphaned shapechanger Tessa Gray works with the London Shadowhunters to find the Magister and destroy his clockwork army, learning the secret of her own identity while investigating his past.

Cora, Nellie, and Michiko, teenaged assistants to three powerful men in Edwardian London, meet by chance at a ball that ends with the discovery of a murdered man, leading the three to work together to solve this and related crimes without drawing undue attention to themselves.