This impressive series provides a sense of the depth and diversity of contemporary Jewish documents while embedding them in explanatory narratives. . . .Underscoring this point [how ‘unprecedented’ the nature of Nazi actions in Poland was even prior to the launching of comprehensive genocide] is one of the chief purposes of War, Pacification, and Mass Murder, 1939, one of the stand-alone volumes in the series, ‘the first comprehensive English-language edition documenting and annotating Einsatzgruppen activities against the background of war and Nazi racial policy in Poland in 1939.’