1. The A to Z of Buddhism by Charles S. Prebish, 2001.
2. The A to Z of Catholicism by William J. Collinge, 2001..
3. The A to Z of Hinduism by Bruce M. Sullivan, 2001.
4. The A to Z of Islam by Ludwig W. Adamec, 2002.
5. The A to Z of Slavery & Abolition by Martin A. Klein, 2002.
6. Terrorism: Assassins to Zealots by Sean Kendall Anderson and Stephen Sloan, 2003.
7. The A to Z of the Korean War by Paul M. Edwards, 2005.
8. The A to Z of the Cold War by Joseph Smith and Simon Davis, 2005.
9. The A to Z of the Vietnam War by Edwin E. Moise, 2005.
10. The A to Z of Science Fiction Literature by Brian Stableford, 2005.
11. The A to Z of the Holocaust by Jack R. Fischel, 2005.
12. The A to Z of Washington, D.C. by Robert Benedetto, Jane Donovan, and Kathleen DuVall, 2005.
13. The A to Z of Taoism by Julian F. Pas, 2006.
14. The A to Z of the Renaissance by Charles G. Nauert, 2006.
15. The A to Z of Shinto by Stuart D. B. Picken, 2006.
16. The A to Z of Byzantium by John H. Rosser, 2006.
17. The A to Z of the Civil War by Terry L. Jones, 2006.
18. The A to Z of the Friends (Quakers) by Margery Post Abbott, Mary Ellen Chijioke, Pink Dandelion, and John William Oliver Jr., 2006
19. The A to Z of Feminism by Janet K. Boles and Diane Long Hoeveler, 2006.
20. The A to Z of New Religious Movements by George D. Chryssides, 2006.
21. The A to Z of Multinational Peacekeeping by Terry M. Mays, 2006.
22. The A to Z of Lutheranism by Günther Gassmann with Duane H. Larson and Mark W. Oldenburg, 2007.
23. The A to Z of the French Revolution, by Paul R. Hanson, 2007.
24. The A to Z of the Persian Gulf War 1990–1991, by Clayton R. Newell, 2007.
25. The A to Z of Revolutionary America, by Terry M. Mays, 2007.
26. The A to Z of the Olympic Movement, by Bill Mallon with Ian Buchanan, 2007.