The second book of the new Lit Squad Mysteries series for 8-12 year-old readers.

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Into the shady world of hackers.
A death on the tracks.
A determined network of international terrorists revives.

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Things fall apart for Tash Nathan, Izzy Lim and Luddie Chua as they attempt to save their teacher, Mr Adam Salleh, who turns out not who he appears to be.

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Answers need to be quickly found before Singapore’s security gets blown up.