Barton Gellman

As Snowden's revelations faded somewhat from the public consciousness, the machinations he exposed continue still, with many policies unaltered despite societal outrage. 

Dark Mirror is a true-life spy tale that touches us all, told with authority and an inside view of extraordinary events. Within it is a chilling personal account of the obstacles facing the author, beginning with Gellman's discovery of his own name in Snowden's NSA document trove. Google notifies him that a foreign government is trying to compromise his account. A trusted technical adviser finds anomalies on his laptop. Sophisticated impostors approach Gellman with counterfeit documents, attempting to divert or discredit his work. Throughout, the author wages an escalating battle against unknown digital adversaries who force him to mimic their tradecraft in self-defence. 

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Book: Dark Mirror