- O Beco dos Doces
- O bilhete premiado
- O cavalinho pérola
- O Clube dos Jovens da Rua de Baixo
- O coração azul de Luísa
- O cão e o curumim
- O melhor presente
- O menino marrom
- O menino transparente
- O meu pé de laranja lima
- O monstro do mar
- O nariz da vovó
- O Pardal Medroso
- O Pequeno Príncipe
- O Projeto de Transformação do Bully da Páscoa: Aventuras de Projetos Juvenis #5
- O Projeto Desastroso do Dia dos Namorados: Aventura de Projetos Juvenis #4
- O pássaro milcores
- O que é amor?
- O rei do grande rio
- O Trem e Outras Histórias
- Obees' Nutty Choice
- Obrigadoo
- Odd Dog Out
- Oh No! I Broke It!
- Oh No! I Lost It!
- Oh No! I Peed Myself!
- Oh No! ¡Me Oriné!
- Oh No, Astro!
- Oh So Brave Dragon
- Oh So Tiny Bunny
- Oh, How Sylvester Can Pester!
- Oh, No!
- Oh, No! Read & Listen Edition
- Olaf und der gelbe Vogel
- Olaf und der gelbe Vogel
- Old Friends, New Friends
- Olive's Perfect World
- Oliver and Jumpy, Stories 55-57 (Oliver and Jumpy, the Cat Series, Book 19)
- Oliver's Journey
- Oliver’s Hair
- Olivia Nibblesqueak's Messy Mischief
- Olivia The Orchid Fairy
- Olivia, el bosque y las estrellas
- Ollie & Moon
- Ollie & Moon: Aloha! (Step into Reading Comic Reader)
- Ollie & Moon: Aloha! (Step into Reading Comic Reader) Read & Listen Edition
- Ollie & Moon: Fuhgeddaboudit!
- Ollie and Claire
- Ollie and the Science of Treasure Hunting
- Ollie the Octopus and the Memory Treasures
- Ollie the Purple Elephant
- Ollie's Treasure
- Olvídate del resto
- Olympia y las Guardianas de la Rítmica 2 - Olympia y la fábrica de gimnastas
- Oma, ich kann deine Geschichten schon lesen
- On a des soucis
- On Air
- On Her Own
- Once Upon a Dragon's Fire
- Once upon a lime
- Once Upon a Mermaid's Tail
- Once Upon a Winter
- Once We Were Witches
- One Big Heart
- One Cool Friend
- One Hundred Reasons To Hope
- One Leap Forward
- One of a Kind
- One Step At A Time
- One Word from Sophia
- One-Day-Friends
- Only Emma
- Only The Heart
- Only Wolf's Breakfast
- Ooko
- Oona
- Oong Lee’s Choice
- Oops! I Made A Mistake, Level 1
- Opal Moonbaby and the Best Friend Project (Book 1)
- Opal Moonbaby and the Out of this World Adventure
- Aventura Total - Operació rescat
- Aventura Total - Operación rescate
- Ordinary Mary's Extraordinary Deed
- Orla the Inventor Fairy
- Os cavaleiros que dizem não!
- Os monstros mais medrosos do mundo
- Os Ziskisitos e a casa mal-assombrada
- Os Ziskisitos e o quadro roubado
- Oscar the Hungry Unicorn
- Ost Has a Dream
- Otis
- Otis and The Kittens
- Otis and the Puppy
- Otis and the Scarecrow
- Otis and the Tornado
- Otis Dooda
- Otis Dooda: Downright Dangerous
- Otis Loves to Play
- Otte prinsesser og et magisk spejl
- Otter Goes to School