* The Forgotten Holocaust: The Poles Under German Occupation, 1939-1944 (2003)
* Beyond the Holocaust: The Untold Story of the Persecution and Murder of Millions of Others by the Third Reich (2010)
Articles
* "The Nazi Concentration Camp System: A Brief Overview" (2004)
* "The Holocaust and the Churches" (2006)
* "The Holocaust in Eastern Europe" (2008)
* "The Holocaust in Western Europe" (2010)
* "The Holocaust and the Jews" (2012)
* "The Holocaust and the Gypsies" (2014)
* "The Holocaust and the Jehovah's Witnesses" (2016)
* "The Holocaust and the Homosexuals" (2018)
* "The Holocaust and the Mentally and Physically Disabled" (2020)
Book Reviews
* "The Diary of Anne Frank: The Revised Critical Edition" (2007)
* "The Complete Works of Primo Levi" (2011)
* "Elie Wiesel: Conversations" (2014)
* "The Nazi Doctors and the Nuremberg Trials: The Complete Transcripts of the Hostage Trial and Related Cases" (2016)
* "The Last Days: The Jews of Berlin Under Nazi Rule, 1943-1945" (2018)