Stanford Encyclopedia of Philosophy has two new entries of interest:
She is best known for two works that had a major impact both within and outside the academic community. The first, The Origins of Totalitarianism, published in 1951, was a study of the Nazi and Stalinist regimes that generated a wide-ranging debate on the nature and historical antecedents of the totalitarian phenomenon. The second, The Human Condition, published in 1958, was an original philosophical study that investigated the fundamental categories of the vita activa (labor, work, action). In addition to these two important works, Arendt published a number of influential essays on topics such as the nature of revolution, freedom, authority, tradition and the modern age. At the time of her death in 1975, she had completed the first two volumes of her last major philosophical work, The Life of the Mind, which examined the three fundamental faculties of the vita contemplativa (thinking, willing, judging).