As almost thirteen-year-old Ben, a student at the CIA's academy for future intelligence agents, prepares to go to spy summer camp, he receives a death threat from the evil organization SPYDER.

"An adopted middle child receives an unexpected package on an otherwise unremarkable birthday inviting her to join a super-secret division of the CIA"-- Provided by publisher.

When Lulu's parents go on vacation, the formidable Ms. Sonia Sofia Solinsky comes to babysit and Lulu behaves as badly as possible to get her to leave until Ms. Solinsky reveals her secret.

When a virus infects Arlington, Virginia, home of NERDS headquarters, transforming victims into criminal masterminds, it is up to Flinch to stop its spread by miniaturizing himself and entering the head of the Villain Virus's creator, Heathcliff Hodges.

"When a desperate man in a nondescript black suit asks thirteen-year-old Carson Fender to deliver a mysterious package for him, the middle schooler discovers there's something going on in his sleepy North Dakota hometown he had never expected--something involving the CIA"-- Provided by publisher.

When a former member of NERDS turns into a villainous cheerleader, Matilda "Wheezer" Choi and the rest of the NERDS must infiltrate the cheerleader squad and save the world from a machine that wreaks havoc by entering other dimensions.

An adventure on the wide open ocean, and Ruby is all at sea. Can she crack the case while evading the clutches of the evil Count von Viscount? Well, you wouldn't want to bet against her.

When the head of the Bureau of Useful Misadventures (or BUM) discovers that an evil organization is using the Student Mind and Body competition to recruit agents, he asks Nathan to enter the competition, but things go terribly wrong when Nathan's nemesis starts to notice some odd things about him, and Nathan fears his zombie identity will be exposed.

"After a routine school field trip goes awry, Linc Baker is thrust into a world of intrigue and espionage, where a kid agent who looks exactly like him threatens to use powerful artifacts to control the world"-- Provided by publisher.

While Chris and five other twelve-year-olds learn to make the most of their mental abilities in a secret, government-run school last used in 1977, twins Ernest and Mort are studying under someone with much more sinister motives.