Drawing from an extensive list of writings about Indonesian Islam that have appeared over the past fifteen years, Federspiel defines approximately 1,800 terms, phrases, historical figures, religious books, and place names that relate to Islam and gives their Arabic sources. This dictionary will be indispensable to English–speaking students and researchers working in Indonesian or Southeast Asian studies. It will also be useful for scholars working in Bahasa Indonesian, reading texts written about Islam by Indonesian Muslims, as well as for Southeast Asia area scholars generally who are using sources in Western languages.