- Olivia and Lambie
- Olivia and the Giant
- Olivia Brophie and Aristotle’s Lantern
- Olivia's Secret Wish
- Olivia's Sweet Adventure
- Olli Öttiäinen lähtee retkelle
- Olympos
- Olympus at War
- On Candy Skates: Imagination Station Chidren's Series Vol. 1
- On The Wrong Foot
- Once Upon a Curse
- Once Upon a Dragon
- Once Upon a Goat
- Once Upon a Slime
- Once Upon A Story You've Always Been Told
- Once Upon a Street
- Once Upon a Time Series- The Strange Visitor
- Once Upon a Time Series: Adventure in the Enchanted Wood
- Once Upon A Time... there was a Thirsty Frog
- Once Upon A Time... there was an Old Woman
- Once Upon A Time...there was a Greedy King
- Once Upon a Twice
- Once Upon an Hour
- Once Upon the End
- One Christmas Wish
- One Dark Hallow's Eve
- One Day as a Raven
- One Day Everyone Was Late For School: Bedtime Story Rhyme
- One More Year
- One Wish
- Only Ona
- Onward Little Golden Book (Disney/Pixar Onward)
- Onyeka and the Academy of the Sun
- Operaatio maitohammas
- Ophelia and the Marvelous Boy
- Opowiesc wigilijna wydanie ilustrowane
- Opowieść z Krainy Elfów 2 - Czarodziejka Czarna Kruczyca
- Opowieść z Krainy Elfów 3 - Miecz w smoczej jaskini
- Oracles of Delphi Keep
- Orca Chief
- Orca's Family
- Origins of Olympus
- OrmenRaske
- Orpheus and Eurydice
- Orpheus Rising/By Sam And His Father,John/With Some Help From A Very Wise Elephant/Who Likes To Danc...
- Orphée et la force du chant
- Orsika the Bear
- Os amigos músicos
- Os Anjinhos ajudantes
- Os cabelos da Iara
- Os cisnes selvagens
- Os cisnes selvagens
- Os Contos da Avó
- Os Contos de Beedle o Bardo
- Os doze passageiros
- Os guardiões do verde
- Os Melhores Contos de Andersen
- Os oito pares de sapatos de Cinderela
- Os sapatos vermelhos
- Oscar and Fred's Big Behind
- Oscar Wilde: Die Erzählungen
- Oscargot s'occupe de tout!
- Osiris Saluki
- Oszkár kalandjai
- Otherworld Chronicles #2: The Seven Swords
- Otherworld Chronicles #3: The Dragon King
- Otherworld Chronicles: The Invisible Tower
- Otterwill Book 3: Tales of Tossledowns
- Otto ja Dracon siepparit
- Otto ja Hydran surfaajat
- Otto ja Plejadien lähettiläs
- Our Principal Breaks a Spell!
- Our Principal Is a Frog!
- Our Principal Is a Noodlehead!
- Our Principal Is a Scaredy-Cat!
- Our Principal Is a Spider!
- Our Principal Is a Wolf!
- Our Principal's in His Underwear!
- Our Royal Adventure
- Outback Outlaw
- Outlaw Princess of Sherwood
- Outlaws
- Over the Hills and Far Away
- Overboard and Out of this Realm
- Owl House: Witches Before Wizards
- Ozma of Oz
- Ozma of Oz (Illustrated)