Book Review: Gray Day by Eric O’Neill

About: Gray Day: My Undercover Mission to Expose America’s First Cyber Spy by Eric O’Neill is a non-fiction book following the author’s investigation into the FBI’s most damaging spy. Mr. O’Neill is a cybersecurity expert and a former FBI agent. 304 pages Publisher: Crown Language: English ISBN-10: 0525573526 My rating for Gray Day – 5 Buy Gray Day from Amazon.com* More Books by Eric O’Neill* Thoughts: I have read many books about cybersecurity, and many books which spy Robert Hanssen (code name: Gray Day) is mentioned, but I never realized the two subject had anything to do with one another, until now. Gray Day: My Undercover Mission to Expose America’s First Cyber Spy by Eric O’Neill is a thrilling memoir about the author’s FBI assignment to “work” for Hanssen while secretly investigating whether he is a Soviet spy or not. The author starts by introducing the reader to his world of shadows. As an FBI “ghost” he was an expert at surveillance while blending into the background, gathering information without notice. Real spy work some might say. As a young agent, Mr. O’Neill was tasked at joining the new cybersecurity division that Mr. Hanssen was put in charge of. Unbeknownst…

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