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2023: With the mystery of what lies beneath London's subway network deepening, Sally Hazzard and Edward Tarn must follow the scant clues to the truth. But what they discover is not just a dusty abandoned Tube station, b…
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2022: Sally Hazzard just had the worst day of her life: While on a usual shift as a driver for the tube, the unthinkable happened when a man is pushed in front of her train and killed. But there's something strange her…