American Reform Responsa(1987), Liberal Judaism and Halakhah (1988), Questions and Reform Jewish-Answers- New Reform Responsa(1991), The Healing Past: Pharmaceuticals in the Biblical and Rabbinic World(1993), Not By Birth Alone, Conversion to Judaism(1997).

Ruth Langer , Assistant Professor of Jewish Studies at Boston College . Author of the forthcoming 7o Worship Properly: Tensions between Liturgical Custom and Halakhah in Judaism, and numerous essays.

Michael Rosen resides in Los Angeles with his wife Rabbi Karen L. Fox. His fields are economics and religious studies.

Mark Washofsky, Associate Professor of Rabbinics, Hebrew Union College- Jewish Institute of Religion in Cincinnati , Ohio . Chair of the Responsa Committee of the Central Conference of American Rabbis. He has published a number of studies in the field of Jewish law and legal theory. He is the editor of 7eshuvot for the Nineties(1997).

Moshe Zemer , Director of the Freehof Institute of Progressive Halakhah; a founder of the Movement for Progressive Judaism in Israel ; founding rabbi of the Kedem Synagogue-Bet Daniel, Tel Aviv . Av Bet Din of the Israel Council of Progressive Rabbis, Senior Lecturer in Rabbinic at the Hebrew Union College , Jerusalem . Contributor of numerous articles on halakhah in the Israeli press and scientific journals; author of The Sane Halakhah[Hebrew ],(1993).