This chapter reviews five books on American Jewish history, written by Joyce Antler, Jessica Cooperman, Kirsten Fermaglich, Rachel Kranson, and Jack Wertheimer. Reading these books together is challenging because they present substantially different interpretations of American Jews. If no definitive single interpretation of 20th-century American Jewish history emerges from these five books, what can be learned about American Jews by reading them together? Two key points emerge. Judaism proves a highly contested arena of American Jewish life. Yet despite the importance of religion, this fractious domain involves only a small portion of American Jews. Cooperman, Kranson, and Wertheimer all explore limits that confound efforts to promote Judaism in the United States among ordinary Jews. By contrast, “Jewishness” opens a valuable window into the complexity of life among Jews in the United States. Fermaglich focuses on how New York Jews coped with rising discrimination that impeded their ambitions for social and economic mobility. In her exploration of Jewish women's politics, Antler illuminates varied components of Jewish identity only occasionally influenced by religious dimensions.