The City Spies Series in Order

About the City Spies series

Series Premise

The series follows five (later six) brilliant but troubled young people from different countries who have been recruited by MI6's secret City Spies program after running afoul of the law or society, forming a found family under the mentorship of a handler known as Mother. Operating from a hidden base called the FARM in Scotland and posing as students at a local boarding school, they undertake covert missions around the world—hacking systems, infiltrating events, stopping villains, and preventing disasters—using their unique skills in tech, athletics, languages, and observation to go places adult agents cannot, all while navigating the complexities of their new team dynamic and personal pasts.

The series is best read in publication (or chronological) order to follow the team's evolving relationships, the progression of their skills and trust, and the subtle continuity of recurring elements like their handler dynamics and growing reputation. While each book features a largely self-contained mission with its own setup, action, and resolution—allowing readers to enjoy any volume independently without major confusion—the overarching story of the group's formation, deepening bonds, and cumulative experience as spies builds meaningfully across installments, making sequential reading ideal for the fullest emotional and narrative payoff.

Main Characters

The heart of the series is the City Spies team: five (later six) diverse, talented teens from around the world who have been recruited after falling through societal cracks, each codenamed after their city of origin. Sara Martinez (Brooklyn), a brilliant American hacker facing juvenile detention, is resourceful, quick-thinking, and the newest member learning to trust her teammates. Sydney (from Australia) is athletic, bold, and fiercely loyal; Paris (French) is charming, multilingual, and smooth under pressure; Kat (Japanese) is analytical, tech-savvy, and quietly brilliant; Rio (Brazilian) is energetic, inventive, and full of heart; and later additions bring fresh dynamics. Mother, their male MI6 handler (a warm, fatherly figure with a mysterious past), guides them with wisdom and care, while Monty (Alexandra Montgomery), his partner, adds sharp intellect and support. The group functions as a found family—teasing, protective, and deeply bonded—whose complementary skills and growing trust drive every mission.

Setting

The series is set in a contemporary world with a top-secret MI6 operation, primarily based at the FARM—a hidden, high-tech facility disguised as a castle in the Scottish countryside—where the team trains, lives, and attends a local boarding school as cover. Missions take them to iconic, globe-trotting locations: Paris for youth summits and hacking challenges, San Francisco's Golden Gate Bridge and tech scenes, Beijing's Forbidden City and cultural landmarks, New Orleans' historic streets and jazz-filled nights, Manhattan's skyscrapers and subways, London landmarks, and more. These real-world cities are vividly rendered with sensory details—crowded streets, famous sights, local food, and cultural nuances—contrasting the glamour of travel with the tension of undercover work. The blend of exotic locales and the cozy, supportive FARM base creates an exciting yet grounded atmosphere where ordinary kids step into extraordinary situations.

Tone & Themes

Ponti's tone is exciting, witty, and warmly optimistic, striking a perfect balance between high-stakes spy thrills and lighthearted middle-grade humor that keeps the stories accessible and fun. The narratives brim with clever banter, self-deprecating jokes, and the kids' relatable reactions to danger (panic, sarcasm, or awe), while never downplaying the seriousness of their missions or the emotional weight of their backstories (abandonment, loss, or mistakes). Suspense is genuine—chases, close calls, hacking under pressure—but violence is minimal and off-page, focusing instead on ingenuity, teamwork, and moral choices. Friendship and found family shine through, with moments of genuine care, encouragement, and growth that add heart without sentimentality. The overall vibe is empowering and joyful—like joining a secret club of clever kids saving the day—ideal for readers who want adventure with laughs, heart, and the reassurance that misfits can become heroes together.

The City Spies series stands out as a smart, exhilarating middle-grade spy adventure that combines globe-trotting action, clever puzzles, and heartfelt friendship into stories that empower young readers to believe in their own potential. James Ponti crafts an irresistible team of misfit heroes whose loyalty, ingenuity, and care for one another shine through every high-stakes mission, delivering consistent thrills, laughs, and gentle lessons about trust and belonging. Perfect for fans of Spy School, Alex Rider, or Mrs. Smith's Spy School for Girls, the books offer addictive, multicultural escapism that celebrates diversity, teamwork, and the idea that even kids who've been overlooked can change the world—one covert operation at a time.