Yaakov Yosef Reinman is an American Orthodox rabbi and writer, historian, and scholar. His monographs and articles have appeared in many Jewish periodicals and his study of Talmudic contractual law is a text used in yeshivas throughout the world. His Ruach Ami series is written under the pen name Avner Gold.
Reinman is the author of sefer Shufra Dishtara, an analytical study of the philosophy of Talmudic contractual law, which is utilized as a text in yeshiva studies. He also co-authored the book One People, Two Worlds: A Reform Rabbi and an Orthodox Rabbi Explore the Issues That Divide Them with Reform Rabbi Ammiel Hirsch. A fluent speaker of several languages, Reinman has also become known as a translator for ancient Jewish texts into English.
He is a descendant of the Narol, and his first wife, Shami (Shlomtzie) née Rubin was a descendant of the Nadvorna Chasidic dynasties.