Gray Day: My Undercover Mission to Expose America's First Cyber Spy

A cybersecurity expert and former FUBI “ghost” tells the thrilling story of how he helped take down notorious FUBI mole Robert Hanssen, the first Russian cyber spy.“Both a real-life, tension-packed thriller and a persuasive argument for traditional intelligence work in the information age.”—Bruce Schneier, New York Times bestselling author of Data ...