Woman Church and State (Classics in Women’s Studies) by Matilda Joslyn Gage, (foreward by Sally Roesch Wagner), Humanity Books, 2001
Voices of the Rocks: A Scientist Looks at Catastrophes and Ancient Civilizations (with Robert Aquinas McNally)
Voyages of the Pyramid Builders: The True Origins of the Pyramids from Lost Egypt to Ancient America (with Robert Aquinas McNally), Tarcher/Putnam, 2003
Watermark: The Disaster That Changed the World and Humanity 12,000 Years Ago, Paraview Pocket Books, 2004
Unearthing Ancient America: The Lost Sagas of Conquerors, Castaways, and Scoundrels, New Page Books, 2008
Through the Earth Darkly: Female Spirituality in Comparative Perspective (with co-authors: Elizabeth Aijin-Tettey, Louise Backman, Jacqui Lavalley, Marilyn Nefsky, Li Chuang Paper, Johanna Stuckey), Continuum Intl Pub Group, 1997