As a young avreich, Rav Zilberstein served as Rosh Yeshiva in Lucerne, Switzerland, where doctors flocked to him with their halachic questions. This was the start of a life-long involvement in the complex halachic ramifications of vast medical procedures and interventions. Rav Zilberstein is renowned as the supreme authority in the sensitive field of Halacha and medicine. His clear and far-reaching responsa have been publicized through a weekly shiur and a monthly fourm attended by doctors and professors from Israel and overseas. Fred Rosner has edited and translated selected medical-halachic responsa in a beautifully bound hardcover edition.