Books like Agent 21 by Ryan, Chris
Secret agent Zak Darke is dispatched back to London for his third mission: an unknown bomber is terrorising the city. Following a deadly explosion on the tube that kills a passenger, Zak and his intelligence team are called in to unravel how this terror cell operates. With limited evidence and no reliable timeline, the team must race against time to locate the next target. The story blends high‑stakes espionage, ticking bomb investigations, and a young‑adult adventure style, making it gripping for junior secondary readers.
First publish date: 2013
Genre: Children's Fiction/Children's Adventure
Authors: Ryan, Chris
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