| Author | Title |
|---|---|
| Barbara O'Connor | How to Steal a Dog |
| Scott O'Dell | Island of the Blue Dolphins |
| Scott O'Dell | Island of the Blue Dolphins |
| Scott O'Dell | Island of the Blue Dolphins |
| Scott O'Dell | Island of the Blue Dolphins |
| Colleen O'Shaughnessy McKenna | Live from the Fifth Grade |
| Jose Maria Obregon | Kaka |
| Lauren Oliver | Curiosity House |
| Joanne Oppenheim | "Not Now!" Said the Cow |
| Shulamith Oppenheim | Fireflies For Nathan |
| Mary Pope Osborn | Vacation Under the Volcano |
| Mary Pope Osborn | Dolphins at Daybreak |
| Mary Pope Osborn | Polar Bears Past Bedtime |
| Mary Pope Osborn | Pirates Past Noon |
| Mary Pope Osborne | Christmas in Camelot |
| Mary Pope Osborne | Mummies and Pyramids |
| Mary Pope Osborne | My Secret War : The World War II Diary of Madeline Beck |
| Mary Pope Osborne | Adeline Falling Star |
| Mary Pope Osborne | Magic Tree House: Tonight on the Titanic |
| Mary Pope Osborne | Night of the Ninjas |
| Mary Pope Osborne | Magic Tree House Monday with the Mad Genius |
| Mary Pope Osborne | Magic Tree House: Summer of the Serpent |