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Author O'Neill, Eric, author.

Title Gray day : my undercover mission to expose America's first cyber spy / Eric O'Neill.

Edition First edition.
Publication Info. New York : Crown, [2019]
1 hold on first copy returned of 1 copy
Location Call No. Status
 95th Street Adult Nonfiction  327.1247073 ONE    AVAILABLE
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Description viii, 291 pages ; 25 cm
Summary "A cybersecurity expert and former FBI "ghost" tells the thrilling story of how he helped take down notorious FBI mole Robert Hanssen, the first Russian cyber spy"-- Provided by publisher.
Subject O'Neill, Eric.
Hanssen, Robert.
United States. Federal Bureau of Investigation.
Cyber intelligence (Computer security)
Spies -- Russia (Federation) -- Biography.
Spies -- United States -- Biography.
Intelligence service -- United States.
ISBN 9780525573524 (hardback)
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