Authors: O

 The Comte de St. Germain
 Traces of a Hidden Tradition in Masonry and Medieval Mysticism
 Lore of the Unicorn
 The Doctrine of the Last Things
 The Secret of the Saucers
 Japanese Fairy Tales
 Yoruba Legends
Okakura The Book of Tea
 The Ideals of the East
 Principal Teachings of the True Sect of Pure Land
 Sun Lore of All Ages
 The Buddhist Catechism
 Baltic Wizards
 Vinaya Texts (Part I) (SBE13)
 Vinaya Texts (Part II) (SBE17)
 Vinaya Texts (Part III) (SBE20)
 The Grihya Sutras, Part 1 (SBE 29)
 The Grihya Sutras, Part 2 (SBE 30)
 Vedic Hymns, Part II (SBE 46)
 A Dweller on Two Planets
 The Danish History
 The Golden Verses of Pythagoras
Omar The Rubayyat of Omar Khayyam
 Ante-Nicene Fathers, Vol. IV
 Ante-Nicene Fathers, Vol. IX
 The Hymns of Orpheus
Orson The War of the Worlds
Osman Anathema of Zos: Automatic Writing
Osman The Focus of Life
Osman The Book of Pleasure (Self-Love). The Psychology of Ecstasy.
 The Myth of the Birth of the Hero
 Noa Noa
 Tertium Organum
 The Symbolism of the Tarot
 The Love Books of Ovid
 The Metamorphoses
 The Love Books of Ovid
 The Metamorphoses