After thwarting a notorious villain at an eco-summit in Paris, the City Spies are gearing up for their next mission. Operating out of a base in Scotland, this secret team of young agents working for the British Secret Intelligence Service’s MI6 division have honed their unique skills, such as sleight of hand, breaking and entering, observation, and explosives. All of these allow them to go places in the world of espionage where adults can’t.
Fourteen-year-old Sydney is a surfer and a rebel from Bondi Beach, Australia. She’s also a field ops specialist for the City Spies. Sydney is excited to learn that she’ll be going undercover on the marine research vessel the Sylvia Earle. But things don’t go exactly as planned, and while Sydney does find herself in the spotlight, it’s not in the way she was hoping.
Meanwhile, there’s been some new intel regarding a potential mole within the organization, offering the spies a lead that takes them to San Francisco, California. But as they investigate a spy who died at the Botanical Gardens, they discover that they are also being investigated. And soon, they’re caught up in an adventure filled with rogue missions and double agents!
The series
There’s something thrilling about watching a team come together—not just any team, but one made up of kids from around the world, each with a secret past and a very particular set of skills. City Spies taps into that energy with precision, turning the idea of elite espionage on its head and handing the mission over to the most unlikely agents: teenagers.
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Set against the backdrop of real global cities and iconic landmarks, this middle-grade spy series doesn’t just serve up high-stakes missions—it pulls readers into a world where loyalty, quick thinking, and empathy are just as essential as hacking skills or parkour. At its heart, the series follows five young recruits, each rescued from difficult circumstances and trained by a mysterious MI6 agent known only as Mother. Together, they infiltrate elite boarding schools, decode encrypted secrets, and stop threats that adults can’t even see coming.
But beneath the clever gadgets and coded messages is something more powerful: a story about found family. These kids aren’t just learning how to be spies—they’re learning how to trust again, how to lean on one another, and how to rewrite the stories they were handed. The action is pulse-pounding, but it’s the moments between missions—the quiet camaraderie, the unexpected vulnerability—that give the series its emotional gravity.
With fast-paced plots grounded in real-world settings and just enough humor to offset the tension, this series hits the sweet spot for readers who crave adventure with depth. City Spies doesn’t just entertain—it invites readers to imagine themselves as brave, brilliant, and capable of changing the world.
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