- O amigo de Darwin
- O is for Oklahoma
- O mar que banha a ilha de Goré
- O mundo perdido
- O Mário que não é de Andrade
- O peso da luz
- O segredo do ídolo de barro
- O Smoku spod Wawelu
- Ociee and Ben Nash, the Asheville Adventure
- Odisseia Olímpica
- Odysseus pojke
- Ohne den Vater
- Old Rock (is not boring)
- Oliver Twist
- Olivia en ik
- Olka and Her Blue Parasol
- Oltre le stelle più lontane
- Oma, ich kann deine Geschichten schon lesen
- On the Duty of Civil Disobedience
- On The Wings of Heroes
- On This Long Journey: The Journal of Jesse Smoke
- On Track for Treasure
- Once Upon a Time Long, Long Ago
- Once Upon Another Time
- Onde øjne
- Onder vuur
- Ondinas (Serie Elementales)
- One Last Word
- One Love, One Heart
- One Small Blue Bead
- Onkel Toms Hütte (Illustrierte Ausgabe)
- Onyx
- Oorlog in inkt
- Oorlogsgeheimen
- Opal Dreaming: The Marble Horses
- Operatie Turtuga
- Orphan of Destiny
- Orphan Train Riders Charles' Christmas Gift
- Oscar's American Dream
- Oskar and the Eight Blessings
- Otto of the Silver Hand
- Otur i borgen
- Our Australian Girl: A Friend for Grace (Book 2)
- Our Australian Girl: A Home for Grace (Book 4)
- Our Australian Girl: A Lesson for Lina (Book 4)
- Our Australian Girl: Alice and the Apple Blossom Fair (Book 2)
- Our Australian Girl: Alice of Peppermint Grove (Book 3)
- Our Australian Girl: Daisy All Alone (Book 2)
- Our Australian Girl: Grace and Glory (Book 3)
- Our Australian Girl: Letty and the Stranger's Lace (Book 2)
- Our Australian Girl: Letty on the Land (Book 3)
- Our Australian Girl: Letty's Christmas (Book 4)
- Our Australian Girl: Lina at the Games (Book 3)
- Our Australian Girl: Lina's Many Lives (Book 2)
- Our Australian Girl: Meet Alice (Book 1)
- Our Australian Girl: Meet Daisy (Book 1)
- Our Australian Girl: Meet Grace (Book 1)
- Our Australian Girl: Meet Letty (Book 1)
- Our Australian Girl: Meet Lina (Book 1)
- Our Australian Girl: Meet Nellie (Book 1)
- Our Australian Girl: Meet Poppy (Book 1)
- Our Australian Girl: Meet Rose (Book 1)
- Our Australian Girl: Meet Ruby (Book 1)
- Our Australian Girl: Nellie and Secret the Letter (Book 2)
- Our Australian Girl: Nellie's Greatest Wish (Book 4)
- Our Australian Girl: Nellie's Quest (Book 3)
- Our Australian Girl: Peacetime for Alice (Book 4)
- Our Australian Girl: Poppy and the Thief (Book 3)
- Our Australian Girl: Poppy at Summerhill (Book 2)
- Our Australian Girl: Poppy Comes Home (Book 4)
- Our Australian Girl: Rose in Bloom (Book 4)
- Our Australian Girl: Rose on Wheels (Book 2)
- Our Australian Girl: Rose's Challenge (Book 3)
- Our Australian Girl: Ruby and the Country Cousins (Book 2)
- Our Australian Girl: Ruby of Kettle Farm (Book 4)
- Our Australian Girl: School Days for Ruby (Book 3)
- Our Australian Girl: The Grace Stories
- Our Australian Girl: The Letty Stories
- Our Australian Girl: The Nellie Stories
- Our Australian Girl: The Pearlie Stories
- Our Australian Girl: The Rose Stories
- Our Australian Girl: The Ruby Stories
- Our Beautiful Game
- Our Jacko
- Our Only May Amelia
- Our Other Lives
- Our Race for Reconciliation
- Our Trip to the Presidential Inauguration
- Outback Outlaw
- Outlaw