"When hackers target locations all over London, Kat leads the City Spies in testing security for the British Museum where a secret message leads them to Egypt and the ancient City of the Dead"--WorldCat.

"Australian teen Olivia Rose is a surfer and a rebel from Bondi Beach, Australia. But these days she's better known as Sydney, the field ops specialist for the City Spies. Operating out of a base in Scotland, this secret team of young agents working for MI6, the British Secret Intelligence Service, have honed their unique skills, such as sleight of hand, breaking and entering, observation, and explosives, to allow them to go places in the world of...

"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...

Middle schoolers Florian and Margaret are determined to catch a spy who is implicating their FBI supervisor, Marcus Rivers, in a variety of crimes--even if they have to break into, and out of, the Library of Congress to do it.