• "A thriller with lots of humour and suspense . . . A very accessible and exciting book for younger readers"

  • "Racy thriller . . . Her characters are credible and the pace is kept up throughout . . . Some exciting twists and turns will keep the reader guessing"

    Daily Telegraph
  • "An exciting thriller, with code-breaking schoolgirl detectives"

  • "A sparkling read"

    Sunday Tribune
  • "Clever and surprising. That's what makes it so brilliant"

    Olivia, aged 9, Sunday Express

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