The book 'Forbidden: A 3,000-Year History of Jews and the Pig' by Jordan D. Rosenblum explores the history of Jews abstaining from eating pork and the reasons behind it. The author traces the origins of this dietary restriction to the Second Temple period, when Jews began to see pork as forbidden food. The book also delves into the use of the pig as a metaphor for Rome in rabbinic texts, reflecting the way Jews resisted the pagan practices of the Roman Empire. However, the author also examines the phenomenon of Jews who eat pork and utilize Judaic concepts to explain their violation of Torah law. Overall, the book offers a comprehensive exploration of the complex relationship between Jews and the pig throughout history.