Many years ago while working in a book store I saw a book on the Einsatzengruppen that if memory serves was a chronological compilation of journal entrees by squad members, victims and bystanders.
While this is the exact book I'm looking for, I would also take recommendations on the Einsatzengruppen in general.
thanks
A much better book on the Einsatzgruppen, (don't get Hitler's Willing Executioners) is "Master's of Death: the SS eiansatzgruppen and invention of the Holocaust" by Richard Rhoes
Aside from the Browning book Ordinary Men (and I second /u/Sid_Burn 's advice not to get Goldhagen), three recent books contextualize the activities of these groups. First, it has become an important part of the historical record since the 1980s that the regular Wehrmacht soldiers were complicit in these activities. Waitman Beorn Marching into Darkness: The Wehrmacht and the Holocaust in Belarus examines how the these soldiers became enmeshed into these mass shooting operations and sometimes initiated them. The activities of the Einsatzgruppen in Ukraine and Belarus have overshadowed their employment in other theaters. War, Pacification and Mass Murder, 1939: The Einsatzgruppen in Poland is a collection of primary sources that shows how the German invasion of Poland was a prologue for their later activities in the wake of Barbarossa. Finally, to complete the story to the postwar period, Hilary Earl's The Nuremberg SS-Einsatzgruppen Trial, 1945-1958: Atrocity, Law, and History covers how the postwar trials helped frame the Holocaust and how the Einsatzgruppen tried to rationalize their actions when put on the stand.
"Hitler's Willing Executioners" by Daniel Goldhagen is a very interesting, if harrowing, account of the actions of one particular unit, Reserve Police Battalion 101.