 Her 2011 book, "", addresses the Roswell UFO incident.The Pulitzer Prize-winning historian Richard Rhodes, reviewing the book in "The Washington Post", called the book "error-ridden," pointing out that she relies on a single source for her claim that in the 1940s Soviet leader Joseph Stalin sent a Nazi-designed flying disc filled with 13-year-olds with surgically enlarged heads into the United States to scare Americans as part of a black propaganda hoax modeled after "The War of the Worlds".He concluded that "Jacobsen shows herself at a minimum extraordinarily gullible or journalistically incompetent."