Constantine Panunzio's 'Soul of an Immigrant' recounts his personal journey from his childhood in Molfetta, Italy, to becoming a prominent figure in American social services. The book chronicles his experiences as a young sailor, arriving in Boston in 1902, his struggles with finding work, learning English, and navigating the challenges of acculturation. It highlights his dedication to assisting immigrants and his involvement in various social service organizations, culminating in his role as administrator of a major agency in Boston. The book also delves into Panunzio's wartime experiences, particularly his leadership of the YMCA on the Italian front during World War I. 'Soul of an Immigrant' further analyzes the political landscape of the post-war era, focusing on the anti-immigrant sentiment and the deportation of suspected radicals. Throughout the book, Panunzio offers a deeply personal and insightful perspective on the immigrant experience in America during the early 20th century.