Juvenile Series and Sequels

O'Dwyer & Grady (3) J
Oakwing (2) J
Oathbreaker's Shadow (2) YA
Obadiah (4) JE
Obernewtyn Chronicles (7) YA
Obi (3) J
Obsidian Mirror (4) YA
Octonauts, The (8) JE
Odd Gods (3) J
Odd Squad (3) J
Odditorium (2) J
Oddly Enough (3) J
Oddly Normal (2) J
Oddmire (2) J
Odds, The (3) J
Of Metal and Wishes (2) YA
Og the Frog (3) J
Oggie Cooder (2) J
Oh My Goddess! (20) YA
Oh My Godmother (3) J
Oishinbo: à la Carte (7) YA
Okomi (8) JE
Old Bear (16) JE
Old Kingdom (5) YA
Old Mother West Wind (8) J
Old Turtle (5) JE
Old Witch (15) JE
Olga (3) J
Olga da Polga (6) J
Olga's Adventures (8) JE
Olive & Beatrix (2) JE
Olive, the Other Reindeer (2) JE
Oliver and Amanda Pig (20) JE
Oliver Dibbs (2) J
Oliver Fibbs (4) J
Oliver Moon, Junior Wizard (12) JE
Oliver Nocturne (5) J
Olivia (8) JE
Olivia (8 x 8 Books) (40) JE
Olivia (Board Books) (16) JE
Olivia (Readers) (18) JE
Olivia Kidney (5) J
Olivia Sharp, Agent for Secrets (4) JE
Ollie & Moon (3) JE
Ollie the Zebra (7) JE
Olympians (11) YA
Omega (2) YA
Omega City (3) J
Omte Origins (3) YA
On My Own History (30) JE
On the Case with Holmes and Watson (14) J
On the Road (4) YA
On the Run (6) J
On the Runway (6) YA
On Time's Wing (12) YA
Once (7) YA
Once Upon a Crime Family (2) YA
Once Upon a Fairy Tale (4) JE
Once Upon a Marigold (2) YA
Once Upon a Prom (3) YA
Once Upon a Time (19) YA
Once Upon a World (5) JE
Once Upon America (19) J
One and Only Ivan (2) J
One Crazy Summer (3) J
One Last Wish (12) YA
One Mean Ant (2) JE
One Piece (94) YA
One-Punch Man (20) YA
Ones, The (2) YA
Only Living Boy (5) J
Only Living Girl (2) YA
Onyx & Ivory (2) YA
Oodlethunks, The (3) J
Oona Crate Mystery (3) J
Openly Straight (2) YA
Operation: Save the Teacher (3) J

Opportunity, The (6) YA
Oracle Prophecies (3) YA
Oracles of Delphi Keep (3) J
Oracles of Fire (4) YA
Oran Trilogy (3) YA
Orbital (4) YA
Orca Currents (117) YA
Orca Echoes (101) JE
Orca Limelights (24) YA
Orca Soundings (142) YA
Orca Sports (52) J / YA
Orca Young Readers (80) J
Orca Young Readers - Eric Walters' Basketball Series (10) J
Orca Young Readers - Kaylee and Sausage Series (2) J
Orca Young Readers - Max and Ellie Series (5) J
Orca Young Readers - TJ Series (5) J
Orchard Novels (4) J
Order of Darkness (4) YA
Order of the Majestic (2) J
Ordinary Basil (2) J
Ordinary People Change the World (16) JE
Ordinary Terrible Things (4) JE
Ore (2) J
Oregon Trail (8) J
Origami Yoda (6) J
Origami Yoda (Companion Books) (1) J
Origin (3) YA
Orion Chronicles (3) YA
Orly Mann Racing Team (3) J
Ormingat Trilogy (3) J
Orp (5) J
Orphan Queen (2) YA
Orphan Train Adventures (7) J
Orphan Train Children (4) J
Orphan Train West (5) YA
Orphans' Journey (4) J
Orphelines, The (5) J
Oscar J. Noodleman (3) J
Oswald (8 x 8 Books) (4) JE
Oswald (Readers) (3) JE
Other (3) YA
Other Life Saga (2) YA
Otherkin (3) YA
Otherworld (Dorset, Skylar) (2) YA
OtherWorld (Segal, Jason) (3) YA
Otherworld Chronicles (3) J
Otherworld: Kate & Logan (2) YA
Otis (12) JE
Otis Dooda (2) J
Otter (5) JE
Otter (Readers) (6) JE
Otto (2) J
Otto and Uncle Tooth Adventure (5) JE
Ottoline (4) J
Our City Adventures (4) JE
Our Principal... (Quix Books) (6) JE
Our Secret Gang (6) J
Our Universe (3) JE
Out of Abaton (2) J
Out of This World (4) J
Outcast (4) J
Outcasts, The (4) J
Outdoor Adventures (4) JE
Outer Banks Trilogy (3) J
Outer Limits (12) J
Outernet (6) J
Outlaws of Sherwood Street (2) YA
Outlaws of Time (3) J
Outliers (3) YA
Outriders (4) J
Overthrow (3) J
Owen and Eleanor (3) J
Owen Foote (6) J
Owl Diaries (14) JE
Owly (6) J
Owly & Wormy (2) JE
Ozark Adventures (3) J