The OAU after Twenty Years, co-edited with Yassin El-Ayouty, (Praeger, 1984).
The Political Economy of Ivory Coast, co-edited with Christopher Delgado, (Praeger, 1984).
International Mediation in Theory and Practice, co-edited with Saadia Touval, (Westview Press, 1985).
Beyond Coercion: the Durability of the Arab State, co-edited with Adeed Dawisha, (Croom Helm, 1988).
Polity and Society in Contemporary North Africa, co-edited with William Mark Habeeb, (Westview Press, 1993).
Negotiating International Regimes: Lessons Learned from the United Nations Conference on Environment and Development (UNCED), co-edited with Bertram I. Spector and Gunnar Sjöstedt, (Graham & Trotman, 1994).
Cooperative Security: Reducing Third World Wars, co-edited with Victor A. Kremenyuk, (Syracuse University Press, 1995).
Peacemaking in International Conflict: Methods & Techniques, co-edited with J. Lewis Rasmussen, (United States Institute of Peace Press, 1997, revised ed., 2007).
International Negotiation: Actors, Structure/process, Values, co-edited with Peter Berton and Hiroshi Kimura, (Macmillan, 1999).
Power and Negotiation, co-edited with Jeffrey Z. Rubin, (University of Michigan Press, 2000).
Between the State and Islam, co-edited with Charles E. Butterworth, (Woodrow Wilson Center, 2001).
Escalation and Negotiation in International Conflicts, co-edited with Guy Olivier Faure, (Cambridge University Press, 2005).
Rethinking the Economics of War: the Intersection of Need, Creed, and Greed, co-edited with Cynthia J. Arnson, (Woodrow Wilson Center Press, 2005).
Diplomacy Games: Formal Models and International Negotiations, co-edited with Rudolf Avenhaus, (Springer, 2007).
The Sage Handbook of Conflict Resolution, co-edited with Jacob Bercovitch and Victor Kremenyuk, (Sage, 2009).