In this third &“thrilling&” (Kirkus Reviews) installment in the New York Times bestselling series from Edgar Award winner James Ponti, the young group of spies help a fellow agent in another international adventure perfect for fans of Spy School and Mrs. Smith&’s Spy School for Girls.After taking down a mole within their organization, the City Spies are ready for their next mission—once again using their unique skills and ability to infiltrate places adults can&’t. The sinister Umbra has their sights set on recruiting a North Korean nuclear physicist by any means necessary, and the City Spies plan to keep an eye on his son by sending Paris to the chess prodigy&’s tournaments in Moscow and Beijing. Meanwhile, Sydney&’s embedded as a junior reporter for a teen lifestyle site as she follows the daughter of a British billionaire on tour with the biggest act on her father&’s music label to uncover what links both the band and the billionaire have to a recent threat from an old Soviet missile base. From a daring break-in at one of London&’s most exclusive homes to a dangerous undercover mission to a desperate search and rescue operation on the streets of Beijing, the City Spies have their work cut out for them on their most dangerous mission yet.