Literature: Modern American Literature. 5th ed. 3 vols. 1999. Each entry for over 400 of the most significant American authors of the twentieth century excerpts a variety of critical approaches and shows the evolution of the critical reception of that author's work. The authors discussed exemplify the best American writing in a variety of genres, from poetry to expository essays, and reflect the diversity of the American experience in the twentieth century.

Social Science: Encyclopedia of World Cultures. 10 vols. 1996. Lists and describes more than 1,500 global cultures. Based on research of social scientists, it is the source for historical, social, political, economic, linguistic, religious, and other information on virtually every existing culture.

Social Science: Encyclopedia of World Cultures Supplement. 2002. Covers cultures not included in the original set and provides updates to cultures that have changed significantly in recent times.

Social Science: New Dictionary of the History of Ideas. 6 vols. 2005. Articles covering ideas that make up Western culture. Each entry explores origin, cultural interpretations, and historical themes of topics as diverse as abolitionism, beauty, communism, diveristy, feminism, love, physics, social capital, and others.