Prof. Kaplan is a three-time winner of the National Jewish Book Award for her books: The Making of the Jewish Middle Class: Women, Family and Identity in Imperial Germany (New York, Oxford University Press, 1991); Between Dignity and Despair: Jewish Life in Nazi Germany (Oxford University Press, 1998); and Gender and Jewish History, co-edited with Deborah Dash Moore (Indiana, 2011).
Her other books include: The Jewish Feminist Movement in Germany: The Campaigns of the Jüdischer Frauenbund, 1904‑1938 (Greenwood Press, 1979); When Biology became Destiny: Women in Weimar and Nazi Germany co‑editor with Renate Bridenthal and Atina Grossmann (Monthly Review Press, 1984);The Marriage Bargain: Women and Dowries in European History, ed. (Institute for Research in History and the Haworth Press, 1985); Jewish Daily Life in Germany, 1618-1945, ed. (Oxford University Press, 2005); Jüdische Welten: Juden in Deutschland vom 18. Jahrhundert bis in die Gegenwart, co-editor with Beate Meyer (Wallstein Verlag, 2005); and Dominican Haven: The Jewish Refugee Settlement in Sosúa, 1940-1945 (New York, 2008), a Finalist, National Jewish Book Award. All of her monographs have been translated into German. Hitler's Jewish Refugees: Hope and Anxiety in Portugal (Yale, 2019)