"A New Religious America: How a 'Christian Country' Has Become the World's Most Religiously Diverse Nation" is a book written by Diana Eck, a professor of comparative religion and Indian studies at Harvard University. In this book, Eck explores the religious landscape of the United States, emphasizing the country's growing religious diversity and the challenges and opportunities it presents. She discusses the presence and influence of various religious traditions, including Christianity, Islam, Hinduism, Buddhism, Judaism, and others, highlighting the ways in which they contribute to the country's social, cultural, and political dynamics. Eck's work offers insights into the evolving nature of American religious identity and the importance of interfaith dialogue and understanding in a pluralistic society.