La Pratica Ipcress by Len Deighton

An ironic, unnamed British intelligence operative is tasked with investigating the baffling disappearance of several scientists and, as he probes Cold War London’s security services, uncovers a covert program that uses psychological manipulation and reconditioning to control its victims. The inquiry drags him into a web of bureaucratic obstacles, double-crosses and morally dim choices, forcing him to navigate office politics and shadowy conspiracies as he pieces together who is exploiting state power and why.

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