“The world’s biggest terrorist has a Pikachu bedspread.” So a reporter learned from former National Security Agency analyst Winner’s mother. In this matter-of-fact narrative, Winner, who “helped the United States government kill people,” opens on May 9, 2017, when she downloaded and printed a five-page document of Russian cyberattacks on U.S. election officials and a company that makes software for voter registration. Why she did so, she allows, was a subject she pondered often as she served out a five-year prison term, part of a sentence that was the longest incarceration for any single-incident leaker. (By contrast, Edward Snowden leaked 1.5 million pages.) Winner’s crime was to send those printed pages to an online site that specialized in national security matters. As she writes, astonishingly, a staffer described the pages to a source who in turn notified the FBI; meanwhile, the staffer also called the NSA and sent photographs of the printed pages, violating “standard Reporting 101 protocols for journalists who need to confirm the authenticity of leaked documents.” Traced to her by virtue of a printer code, the document occasioned her arrest and conviction under the terms of the Espionage Act of 1917, meant as a legal tool against German secret agents during World War I. After 15 months in jail, a plea bargain earned her a spot in federal prison, “a vacation, filled with activities and amenities,” compared to where she’d been. Winner writes candidly about the hellish nature of incarceration in America, from constant violence to boredom and the challenge of contending with conflicting and arbitrary rules, with her fellow prisoners more often than not less dangerous than the staff: “These weirdos, outcasts, and criminals loved me, and I loved them back.”