Eleven-year-old Chester and his classmate Skye, tasked with a complex puzzle-solving mission, discover the key to their spy assignment is to stop a heist, but cracking the code could mean finding out things are not always what they seem.
Sara Martinez is a hacker. She recently broke into the New York City juvenile justice system to expose her foster parents as cheats and lawbreakers. However, instead of being hailed as a hero, she finds herself facing years in a juvenile detention facility and banned from using computers. Enter Mother, a British spy who not only gets sara released from jail but also offers her a chence to make a home for herself withing a secret team of your MI6 agents. Operatiing out of a centuries-old manor house on the coast of Scotland, the City Spies are five kids from around the world. When they're not attending an elite boarding school, they're training for their roles as the biggest secret in British Secret Intelligence Service. Before she knows what she's doing, Sara is heading to Paris fro an international youth summit, hacking into a rival school's computer to prevent them from winning a million euros, dangling thirty feet off the side of a building, and trying to stop a notorious villain... all while navigating the complex dynamics of her new team. No one said saving the world was easy...
Eleven-year-old Harriet keeps notes on her classmates and neighbors in a secret notebook, but when some of them find out they are so upset they shun her, and Harriet must find a way to win them back.
Neither Cleo nor Evan like the new school librarian, Ms. Crowley, but they are very curious about where she disappears to at the back of the library, so one day they follow her--and find a secret door, a magical library full of locked books, and a letter from the previous librarian telling them that she is trapped somewhere between the covers of one of the enchanted books, and they must travel through the stories in order to save her.
Seventh-grader Georges adjusts to moving from a house to an apartment, his father's efforts to start a new business, his mother's extra shifts as a nurse, being picked on at school, and Safer, a boy who wants his help spying on another resident of their building.
One day, Mac (smartest boy in his class in a small town in California) receives a telephone call from the Queen of England, recruiting him to find the crown jewels (well, actually just the Coronation Spoon) and so Mac embarks on his first adventure as a secret agent--with the assurance that the Queen will give him a note excusing him from school.
Twelve-year-old Abigail is shocked to discover her elite boarding school is really a cover for a huge spy ring, and must undergo Spy Training 101 in order to save her mother, who happens to be the spy ring's top agent.
While running a spy network from their elementary school, five unpopular misfits combine their talents and use cutting-edge gadgetry to fight evil around the world.
Twelve-year-old Ben Ripley leaves his public middle school to attend the CIA's highly secretive Espionage Academy, which everyone is told is an elite science school.