Old Curiosity Shop. By Charles Dickens.
Old Mam’selle’s Secret. By E. Marlitt.
Old Mortality. By Sir Walter Scott.
Old Myddleton’s Money. By Mary Cecil Hay.
Oliver Twist. By Chas. Dickens.
Only the Governess. By Rosa N. Carey.
On the Heights. By Berthold Auerbach.
Oregon Trail. By Francis Parkman.
Origin of Species. By Charles Darwin.
Other Worlds than Ours. By Richard Proctor.