O'Brien, Henry
The Round Towers of Ireland; Parbury & Allen; London; 1834
O'Byrne, J. (ed.)
Advanced Sky Watching; Time-Life Books; New York; 1997
O'Hogain, Daithi
The Sacred Isle: Belief and Religion in Pre-Christian Ireland; Collins Press; Cork; 1999
O'Kelly, C.
Concise Guide to Newgrange; C.O. Kelly; Cork, Ireland; 1984
Oliphant, Margaret
Atlas of the Ancient World: Charting the Great Civilizations of the Past; Simon and Schuster; London; 1992
Olsen, Brad
World Stompers, A Global Travel Manifesto
Consortium of Collective Consciousness; Santa Cruz, California;
Sacred Places of North America, 108 Destinations
Consortium of Collective Consciousness; Santa Cruz, California;
Sacred Places Around the World, 108 Destinations
Consortium of Collective Consciousness; Santa Cruz, California;
Sacred Places of Europe, 108 Destinations
Consortium of Collective Consciousness; Santa Cruz, California;
Olson, Carl (ed.)
The Book of the Goddess, Past and Present; Crossroad Publishing, New York, NY; 1990
O'Malley, Brian B.
A Pilgrims Manual; Paulinus; 1985
Ondaatje, Michael et al.
100 Journeys for the Spirit; Sterling Publishing; New York; 2010
O'Neil, W.M.
Time and the Calendars; Sydney University Press; Sydney; 1975
Oppenheimer, Stephen
Eden in the East: The Drowned Continent of Southeast Asia; Weidenfeld and Nicolson; London; 1998
Oram, Richard D.
Scottish Prehistory; Birlinn; Edinburgh; 1997
Orliac, Catherine and Michael
Easter Island: Mystery of the Stone Giants; Harry N. Abrams; New York; 1995
Ortiz, Alfonso
The Tewa World: Space, Time, Being, and Becoming in a Pueblo Society; University of Chicago Press; Chicago; 1969
Ortner, John
Where Every Breath is a Prayer; Stewart, Tabori & Chang; New York; 1996
Osborne, Harold
South American Mythology; Peter Bedrick Books; New York; 1986
Ovason, David
The Secret Architecture of Our Nation's Capital; Harper Collins; New York; 2000
Owen, A.L.
The Famous Druids; Oxford University Press; Oxford; 1962