October Sky by Homer Hickam
Oedipus Rex or Oedipus the King by Sophocles
Of Mice and Men by John Steinbeck
Oliver Twist by Charles Dickens
The Once and Future King by T. H. White
One Day in the Life of Ivan Denisovich by Alexander Solzhenitsyn
On the Beach by Nevil Shute
On the Road by Jack Kerouac
The Open Boat by Stephen Crane
Our Town by Thornton Wilder
The Outsiders by S. E. Hinton
Out of This Furnace by Thomas Bell
The Ox-bow Incident by Walter Van Tilburg Clark