Floor's books on Iran could be categorized into energy related publications, Persian Gulf, art, social history, economic history, political history, and medical history. He also has numerous published papers (250 plus) in each categories in reputable journals including, but not limited to International Journal of Energy Research, International Journal of Middle Eastern Studies,The Middle East Journal, Journal of International Affairs, Zeitschrift der Deutschen Morgenländischen Gesellschaft, Die Welt des Islams, Studia Iranica, Iranian Studies, and Journal of the Economic and Social History of the Orient, as well as many entries in the Encyclopedia Irania, Encyclopedia of Islam.
