Book excerpt: As the Palestinian Liberation Organization engages in negotiations with Israel toward an interim period of limited Palestinian self-rule, this timely book provides an insider's view of how the growing hold of Islamic fundamentalism in the West Bank and Gaza challenges the peace process. Working from interviews with leaders of the movement and from primary documents, Ziad Abu-Amr traces the origin and evolution of the fundamentalist organizations Muslim Brotherhood (Hamas) and Islamic Jihad and analyzes their ideologies, their political programs, their sources of support, and their impact on Palestinian society. With a solid grasp of the dynamics of these movements, Abu-Amr charts the struggle between the fundamentalists and the PLO to define the identity of Palestinian society, its direction, and its leadership.