Donald Wagner (pictured) is the National Program Director of Friends of Sabeel:  North America and Walter Davis is co-chair of the education committee of the Israel-Palestine Mission Network of the Presbyterian Church (USA) and professor emeritus at San Francisco Theological Seminary.  They have co-edited Zionism and the Quest for Justice in the Holy Land that explores the theological foundations of political Zionism.    The study guide that accompanies this book, Zionism Unsettled, is available at the IPMN website.