- Observing Animal Opposites
- Obsession
- Obsidiáni (Oliver Blue a Škola pro Vidoucí—Kniha třetí)
- Occhiolina, Biocchiolina, Triocchiolina
- OCDaniel
- Ocean
- Ocean A Children's Encyclopedia
- Ocean Animals
- Ocean Animals (Multilingual Board Book)
- Ocean Animals from Head to Tail
- Ocean City - Tome 1 - Chaque seconde compte
- Ocean City - Tome 2 - Dans la cachette des rebelles
- Ocean Counting
- Ocean Currents and El Niño
- Ocean Fish School
- Ocean Friends
- Ocean Lullaby
- Ocean Maps
- Ocean Meets Sky
- Ocean Monsters
- Ocean of Blood
- Ocean Speaks
- Ocean Without End
- Oceanella
- Oceania T1 : la prophétie des oiseaux
- Oceania T2 : horizon blanc
- Oceans
- Oceans of Love
- Ociee and Ben Nash, the Asheville Adventure
- Ockleberries to the Rescue
- Ocorrências Policiais
- Octavio The Octopus Follows His Dream
- Octavius O'Malley And The Mystery Of The Criminal Cats
- Octavius O'Malley And The Mystery Of The Exploding Cheese
- Octavius O'Malley And The Mystery Of The Missing Mouse
- Octi Gets a Shot
- Octie Octopus and the Ocean Adventure
- Octo-Man and the Headless Monster #1
- Octo-Mommy
- October, October
- Octopus Egg
- Octopus Escapes!
- Octopus Express
- Octopus Shocktopus!
- Octopus' Odd Object
- Octopuses For Kids
- Octopuses One to Ten
- Octopuses: Eight Armed Wonders: Educational Version
- Océane Lachance - tome 1
- Odamı Temiz Tutmayı Çok Severim
- Odd Dog Out
- Odd One Out
- Odd One Out (Readaloud)
- Odd One Out US Ed (Readaloud)
- Odd! Birds
- Oddfellow's Orphanage
- Oddvold og vindøen - Lyt&læs
- Ode To The Monster In Me
- Odeio aula remota
- Odessa
- Odessa Again
- Odete e Osmar
- Odie and the New Cats
- Odie Needs A New Home!
- Odie the Stray Kitten
- Odie's Best Friend
- Odil and the Dragon
- Odile and the pelican - Odile et le pélican
- Odin får en lama, Læs lydret 2
- Odin får nok, Grøn læseklub
- Odin ser en dæmon, Læs lydret 2
- Odio el Rosa 3: Historia de Alan
- Odio el Rosa Historia de Dani 1
- Odio el Rosa Historia de Sara 1
- Odisea
- Odisseia de Homero (segundo João Vítor)
- Odisseia Olímpica
- Odonata: The Flying Jewel of Maiden Grass Pond