- O anel que tu me deste
- O data pentru totdeauna
- O despertador chamou Raul
- O enigma da cidade perdida
- O gigante do Maracanã
- O Haiti de Jean
- O homem estranho da casa ao lado
- O maior mágico do mundo
- O menino que lia nuvens
- O que Você Faz com Uma Ideia?
- O saci epaminondas
- O vaso chinês
- O, Christine
- Oath of Destruction
- Oatis and Family "Life in Pennsylvania Dutch Country"
- Obra negra
- Odd Girl In
- Oddfellow's Orphanage
- Oddity
- Odessa Again
- Odins Schwert
- Of Mice and Men
- Of Mice and Nutcrackers
- Off Leash: How a dog saved my life
- Off Limits: How a Friend Saved My Life
- Off Limits: The Principal's Son
- Off Limits: The Scrooge
- Off Limits: The Smarty-Pants
- Off the Page
- Off the Rim
- Offsides
- Og så drukner jeg ...
- OGINALII, is Cherokee for My Friend Like Horse is to My Heart
- Oh, boy!
- Ohana significa familia
- Old Blue
- Old Promises
- Old Promises
- Oliphant Island: A Tale of Three Sisters
- Oliver Twist
- Oliver Twist
- Oliver Twist (Illustrated + FREE audiobook download link)
- Oliver Twist + Audiobook
- Oliver Twist + The Old Curiosity Shop
- Oliver Twist de Charles Dickens (Guía de lectura)
- Olivia and the Troublemaker
- Olivia Bean, Trivia Queen
- Olivia Twisted
- Olivia y su gatito aprenden a conocerse
- Om natten lyver jeg aldrig
- OMG Queer
- On n'a rien vu venir
- On Pointe
- On the Edge of the Dark Sea of Darkness
- On The First Day of School
- On the Runway Series
- On the Slopes
- Onbekende tyd van geluk
- Once
- Once and for All
- Once There Were Two
- Once Upon a Wombat Time
- Once We Were Witches
- Once You Know This
- Once, in a Town Called Moth
- One
- One & Half Mother
- One Big Mess
- One Boy, No Water
- One Dream Only
- One for the Murphys
- One Great Lie
- One Last Wish: Three Novels
- One Mixed-Up Night
- One of Ours
- One of Those Hideous Books Where the Mother Dies
- One Paris Summer
- One Plus One Equals Blue
- One Pound Fish
- One Shark, No Swim
- One Small Thing
- One Square Inch
- One Summer Season: A Young Man's Brutal Baptism Into Love And Baseball
- One Truth, No Lie
- One-Third Nerd
- Only Emma
- Only the Stars Know Her Name
- Only When it Rains
- Operation Clean Sweep
- Operation Normal
- Operation Prom Date
- Operation: Dump the Chump
- Opie Jones and the Superhero Slug
- Opposite Island
- Optimists Die First
- Or Give Me Death
- Orchards
- Ordinary Alphabet
- Orgueil et Préjugés
- Origens
- Original Fake
- Orphan Eleven
- Orphan, Agent, Prima, Pawn
- Orphans of the Tide
- Orphans' Inn
- Orphea Proud
- Orpheus Girl
- Oscar J: Skipper Can No Longer Play... and Daddy Can No Longer Stay...
- Oser pour soi