From David Greenberg, Washington Post: “[M]asterful (and timely)… Privacy is clearly a protean concept, and Igo deftly reviews the definitions that scholars have offered in their efforts to cage its elusive essence. She judges these attempts helpful but less than conclusive. Her own ambitious solution is to embrace privacy’s multifariousness. In her marathon trek from Victorian propriety to social media exhibitionism, she recounts dozens of forgotten public debates… [U]tterly original.”