Agent Q, or the Smell of Danger
by M. T. Anderson
As Lily, Katie, and Jasper try to return home after their adventures in Delaware, they face a protoplasmic monster, sleeping gas, a runaway rice cart, sentient lobsters, and spies of the Awful and Adorable Autarch of Dagsboro.
by Chris Rylander
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.
by Julia Platt Leonard
When thirteen-year-old Oz Keillor finds a dead body in his family's Santa Fe, New Mexico, restaurant, he is determined to solve the mystery in which his older brother is implicated, but which also involves their long-dead father, who was accused of being a spy.
Liar & Spy
by Rebecca Stead
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.
by Dan Gutman
On a cross-country vacation with their parents, twins Coke and Pepsi, soon to be thirteen, fend off strange assassins as they try to come to terms with their being part of a top-secret government organization known as The Genius Files.
Playing With Fire
by Bruce Hale
Reluctant orphan-turned-spy Max Segredo discovers intrigue at the Merry Sunshine Orphanage and must confront an international group bent on world domination, while uncovering mysteries from his past.
The Case of the Case of Mistaken Identity
by Mac Barnett
When twelve-year-old Steve Brixton, a fan of Bailey Brothers detective novels, is mistaken for a real detective, he must elude librarians, police, and the mysterious Mr. E as he seeks a missing quilt containing coded information.
The Family Hitchcock
by Mark Levin
When they agree to a summertime house swap with an unknown family in Paris, the four members of the Hitchcock family inadvertently get mixed up in a ring of international espionage.
Zeke Bartholomew: Superspy
by Jason Pinter
When average kid Zeke Bartholomew is kidnapped and mistaken for a spy, he finds himself in the middle of a dangerous mission to stop the evil mastermind Le Carré from turning the children of the world into mindless zombies.