"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...

Codename Kathmandu, better known as Kat, loves logic and order, has a favorite eight-digit number, and can spot a pattern from a mile away. So when a series of cyberattacks hits key locations in London while the spies are testing security for the British Museum, it's clear that Kat's skill for finding reason in what seems like randomness makes her the perfect candidate to lead the job. And while the team follows the deciphered messages to Egypt and...

The City Spies search for Cairo's missing sister in Rome before returning to London to stop an attack on the royal wedding.