- O Livro dos Sobrenomes Celtas
- Odd Job Man
- Oedipe - Sophocle (Fiche de lecture)
- Of Mice and Men: Review Guide
- Of Minds and Language
- OK
- Oliver Twist de Charles Dickens (Fiche de lecture)
- OMG
- On Discourse Analysis in Classrooms
- On Humbug
- On ne badine pas avec l'amour - Alfred de Musset (Fiche de lecture)
- On the Dot
- On The Rock
- One Day in the Life of the English Language
- One Word Substitution
- One Word Substitution
- One-Letter Words, a Dictionary
- Only Imagine
- Ontology after Carnap
- Opposites
- Opstokers, fopdossers en tweegatjakkalse
- Orality and Performance in Classical Attic Prose
- Orality, Textuality, and the Homeric Epics
- Ord med historia
- Origins of Language
- Origins of the Greek Verb
- Orthographe : qui a peur de la réforme ?
- Ortografía fácil
- Oscar et la dame rose d'Eric-Emmanuel Schmitt (Fiche de lecture)
- Othello: Review Guide
- Other-Wordly
- Our Worlds in Our Words
- Overtested
- Oxford Companion to the English Language
- The Oxford Companion to World Mythology
- Oxford Dictionary of Idioms
- Oxford Dictionary of Proverbs
- Oxford Dictionary of Word Origins
- Oxford Guide to Effective Argument and Critical Thinking
- Oxford Guide to Effective Writing and Speaking
- Oxford Guide to Plain English
- The Oxford Handbook of Japanese Linguistics
- Oxford Handbook of Music Psychology