Títulos
- Obras (Francisco Child Rolim de Moura) [8-633LMR]
- Obras (Francisco d'Andrade) [8-593LMR]
- Obras poéticas de Don José de Espronceda
- Occultism
- L'occultisme hier et aujourd'hui
- The odd women
- Odes et Ballades
- The odes of Pindar
- L' Odyssée
- The Odyssey of Homer
- Oedipus
- Oeuvres chosies de Gresset
- Oeuvres de Molière
- Oeuvres d'Horace
- Oeuvres poétiques de N. Boileau
- The old curiosity shop
- The old man in the corner
- Omar Khayyám
- On art and artists
- The one before
- One of the thirty
- On the exercise of judgement in literature
- On the influence of religion upon truthfulness being two chapters from an historical enquiry into...
- On the origin of species by means of natural selection or the preservation of favoured races in the...
- Opalas
- Oração á luz
- Oração ao pão
- Oração da fome
- The orations of S. Athanasius against the arians
- Origens da nacionalidade portugueza
- Origens do Bairro-Alto de Lisboa
- The origin and nature of life
- The origin and treatment of stammering
- Origine de l'homme
- L'origine des espèces
- L'origine du language
- Les Origines du rituel dans l'Église et dans la maçonnerie
- Orpheu
- Oscar Wilde (Robert H. Sherard) - 1st ed [9-84]
- Oscar Wilde (Arthur Ransome) - 4th ed [8-460]
- Oscar Wilde (André Gide) - 3éme ed [8-216]
- Oscar Wilde and his mother
- Our ancient brethren the originators of freemasonry
- Our best poets
- Outlines of local government including the education act, 1918 and a chapter on social service
- The Oxford book of victorian verse