Sixteen-year-old Gwyneth discovers that she, rather than her well-prepared cousin, carries a time-travel gene, and soon she is journeying with Gideon, who shares the gift, through historical London trying to discover whom they can trust.

Nathaniel, a magician's apprentice, summons up the djinni Bartimaeus and instructs him to steal the Amulet of Samarkand from the powerful magician Simon Lovelace.

Jonathan Starling's father is in an asylum and his home has been attacked when, while running away from kidnappers, he stumbles upon Darkside, a terrifying and hidden part of London ruled by the descendents of Jack the Ripper, where Jonathan is in mortaldanger if he cannot find the way out.

After being told that his father was an assassin for a criminal organization, fourteen-year-old Alex goes to Italy to find out more and becomes involved in a plan to kill thousands of English schoolchildren.

London is a ruin, destroyed by German bombs, ravaged by the Horologia virus, and ruled by the ruthless Captain Hanz Otto Oswald Kretschmer, whose Marauders search for and seize the children who are immune to the virus in the hope that their blood will produce a cure--their latest victim is sixteen-year-old Gwen Darling's younger sister and Gwen will do anything to get her back, even join up with Pete and his gang of Lost Boys living in a city hidden...

While in London visiting her mother, fifteen-year-old Miranda guiltily enjoys the company of a British boy while wondering why Dex is out of touch, but she returns home to find her friendships, love life, family, and math team are all in turmoil.

When she returns home after two years, Fever finds that her Scriven mother's creation, New London, the city on wheels, is nearly complete and ready to fight the nomad tribes of Britain--and Fever must journey to the north to find the ancient birthplace of the Scriven mutants and solve the mystery of her own past.

Sixteen-year-old Gwen, the newest and final member of the secret time-traveling Circle of Twelve, searches through history for the other time-travelers, aided by friend Lesley, James the ghost, Xemerius the gargoyle demon, and Gideon, the Diamond, whose fate seems bound with hers.

Through multiple perspectives, tells of London in the near future where, when the government stops distributing a behavioral modification drug, Concentr8, chaos erupts and five teens take a man hostage, seemingly at random, changing all of their lives forever.