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THE HIGHLY-ANTICIPATED BRAND NEW NOVEL IN THE #1 BESTSELLING RIVERS OF LONDON SERIES There is a world hidden underneath this great city... The London Silver Vaults - for well over a century, the largest collection of silver for sale in the world. It has more locks than the Bank of England and more cameras than a celebrity punch-up. Not somewhere you can murder someone and vanish without a trace - only that's what happened. The disappearing act, the reports of a blinding flash of light and memory loss amongst the witnesses all make this a case for Detective Constable Peter Grant and the Special Assessment Unit. Alongside their boss DCI Thomas Nightingale, the SAU find themselves embroiled in a mystery that encompasses London's tangled history, foreign lands and, most terrifying of all, the North!