Scorpion Trail — Geoffrey Archer

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Alex Crawford has been out of MI5 and the combat zone for twenty years, but now fate has thrust him back into the front line.

Though he is an aid worker, the secret service minders who have protected him for so long have reactivated him: they want information about the man who perpetrated a massacre in a Muslim village in Bosnia at the height of the Kosovo War.

His target is the most ruthless killer in the whole war zone: Milan Pravic, codename the Scorpion. And the only eyewitness to the massacre is a twelve-year-old girl whom Pravic will do anything to silence.