- O Guia do Concurso Público
- O Hack Poliglota
- O que queres ser?
- Obra completa
- Ocean A Children's Encyclopedia
- Odyssee von Homer (Lektürehilfe)
- Oedipus the King by Sophocles (Book Analysis)
- Of Mice and Men by John Steinbeck (Book Analysis)
- Oh No, Not Another Test!
- Okay Klip Løb
- Oliver Twist by Charles Dickens (Book Analysis)
- Oliver Twist by Charles Dickens (Book Analysis)
- Oliver Twist de Charles Dickens (Guía de lectura)
- Oliver Twist di Charles Dickens
- Oliver Twist von Charles Dickens (Lektürehilfe)
- On Beauty by Zadie Smith (Book Analysis)
- On the Road by Jack Kerouac (Book Analysis)
- One Flew Over the Cuckoo's Nest by Ken Kesey (Book Analysis)
- One Hundred Years of Solitude by Gabriel García Marquez (Book Analysis)
- One novel...a lot of Novels
- Onkel Toms Hütte von Harriet Beecher Stowe (Lektürehilfe)
- Operation Desert Storm
- Organisms
- Orgullo y prejuicio de Jane Austen (Guía de lectura)
- Orlando: A Biography by Virginia Woolf (Book Analysis)
- Oscar and the Lady in Pink by Éric-Emmanuel Schmitt (Book Analysis)
- Oscar y Mamie-Rose de Éric-Emmanuel Schmitt (Guía de lectura)
- Oskar und die Dame in Rosa von Éric-Emmanuel Schmitt (Lektürehilfe)
- Othello by William Shakespeare (Book Analysis)
- Othello von William Shakespeare (Lektürehilfe)
- Other Lives But Mine by Emmanuel Carrère (Book Analysis)