 He is also a prolific and erudite author, penning at least 9 books on such topics as "halacha", Torah and the Jewish calendar, as well as some very popular Passover Haggadahs.His is the first name in the Mesorah Heritage Foundation box of the inner cover in Artscroll publications.His brother, Rabbi Reuven Feinstein, is rosh yeshiva of the Staten Island branch of Mesivta Tifereth Jerusalem.