- O Abeto
- O autíčku Broučkovi
- O Canto da Lua
- O cavalinho notável
- O Conto do Vento
- O conto que não existe
- O Corcunda de Notre-Dame em cordel
- O dvanácti měsíčkách
- O encontro da cidade criança com o sertão menino
- O Guardião do Pentáculo
- O herói e a feiticeira
- O Herói por nascer da Vila do Dragão
- O homem da máscara de ferro
- O homem sem alma
- O Jardim do Paraíso
- O Kajtku Szczęściarzu
- O Karaíba
- O krasnoludkach i sierotce Marysi
- O mágico do Barro Preto
- O Oitavo Vilarejo
- O Patinho Feio
- O pomo de ouro e o cavalo de Troia
- O portal dos Gnomos
- O príncipe e o mendigo
- O Rato do campo e o Rato da cidade
- O roubo da estátua de Ganesh
- O roubo da varinha de condão e outras histórias
- O Rouxinol
- O rouxinol e o imperador
- O Sapo Envergonhado
- O Soldadinho de Chumbo e a Princesa
- O sonho de Borum
- O sumiço da Lua
- O tatu Venâncio
- O tom, že někdy i hrábě rozkvetou…
- O touro Estanislau
- Oakley and the Grump
- Oathbound
- Oathsworn
- Oberon's Children
- Obsidian Heart (The Sisters with the Glass Hearts & Jet Black heart (5SOS))
- Obviously Horatio
- Ocean so Wide
- Odd and the Frost Giants
- Odile and the pelican - Odile et le pélican
- Odin's Ravens
- Odin, Loki, Thor, and More Children's Norse Folktales
- Odins Fame
- Odins Memoiren
- Odysseus
- Odysseus in the Serpent Maze
- Oedipe le maudit
- Of Beast and Beauty
- Of Beast and Burden
- Of Crows and Owls
- Of Curses and Kisses
- Of Dragons and Fae: Is a Fairy Tale Ending Possible for the Princess’s Hairstylist?
- Of Enemies and Endings
- Of Fire and Ash
- Of Firebirds and Frost
- Of Glass and Glamour
- Of Gold and Greed
- Of Indigo and Ice
- Of Love & Legend
- Of Mice and Men
- Of Mist and Murder
- Of Neptune
- Of Princes and Promises
- Of Snow and Roses
- Of the Book
- Of Triton
- Of Wind and Winter
- Ogre Enchanted
- Oh No! Zeus Ate His Wife! Mythology and Folklore Children's Greek & Roman Books
- Oh. My. Gods.
- Okaï et Choda
- Old Greek Folk Stories Told Anew
- Old Greek Stories
- Old Hungarian Fairy Tales
- Old Indian Legends
- Old King Cole's Daughters Two
- Old Romanian Fairytales
- Old-Fashioned Fairy Tales
- Olinguito Speaks Up
- Olive
- Olive Fairytales
- Olivia's Magic Conch
- Olivion's Favorites
- Olmec Civilization for Kids - History and Mythology America's First Civilization 5th Grade Social ...
- Olympians: Aphrodite
- Olympians: Apollo
- Olympians: Ares
- Olympians: Artemis
- Olympians: Athena
- Olympians: Hades
- Olympians: Hephaistos
- Olympians: Hera
- Olympians: Hermes
- Olympians: Poseidon
- Olympians: Zeus
- On Guard
- On Shadowed Wings
- On the Planet of the Jesters
- Once
- Once & Future
- Once Upon a Cruise: A Wish Novel
- Once & Future
- Once Upon a Cruise: A Wish Novel
- Once Upon a Dream
- Once Upon A Storm
- Once Upon A Tear
- Once upon a Time Children's European Folktales
- Once Upon A Time In America
- Once Upon a Time…
- Once Upon a Toad
- Once Upon A War
- Once Upon the End
- Once... Tales, Myths and Legends of Faerie
- One Blood Ruby
- One Night With the Fae
- One Thousand Eyed Spies
- One True King
- One Wish
- Only Everything
- Onoverwinnelijk
- Onwaachige the Dreamer
- Opal (a Raven Cycle Story)
- Opasno ljeto u Mumindolu
- Ophelia and the Marvelous Boy
- Opowieści o małej czarownicy Ismie
- Opowieści Starego Dębu
- Oracles of Delphi Keep
- Orage sur le Val d'Hespar
- Orange Fairytales
- Orfe
- Origins of the Siren Wars
- Origins: Guardian
- Orphan of Destiny
- Orphans of the Tide
- Orphant Annie Story Book - Illustrated by Johnny Gruelle
- Orphée aux Enfers
- Orphée l'enchanteur
- Oryn ou la légende du Peuple de l'eau
- Orzeł i sroka
- Os 12 Trabalhos de Severino
- Os amores de Perseu: Dânae e Andrômeda: 2ª edição
- Os Contos de Beedle o Bardo
- Os doze trabalhos de Hércules – vol. 1
- Os doze trabalhos de Hércules – vol. 2
- OS MELHORES CONTOS ÁRABES
- Os três porquinhos
- Otherworld Chronicles #2: The Seven Swords
- Otherworld Chronicles #3: The Dragon King
- Otherworld Chronicles: The Invisible Tower
- Otto of the Silver Hand
- Otílio, o pinguim
- Ouija
- Ouitalos