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Series Starting with "O"

Obernewtyn
Obernewtyn ChroniclesIsobelle CarmodyAges 12+
Octavius O'Malley and the Mystery of the Exploding Cheese
Octavius O'MalleyAlan SunderlandAges 8+
Old Tom
Old TomLeigh HobbsAges 6+
Olive of Groves
Olive of GrovesKatrina NannestadAges 8+
Once
OnceMorris GleitzmanAges 12+
Ophelia Wild, Secret Spy
Ophelia WildElena de RooAges 7+
The Oracle
OracleCatherine FisherAges 11+
The Strange Case of Origami Yoda
Origami YodaTom AnglebergerAges 8+
Meet Grace (Book 1)
Our Australian GirlSofie LagunaAges 8+
The Wonderful Wizard of Oz
OzL. Frank BaumAges 9+