books I have read at least three times (and probably more than that):

• The Giver by Lois Lowry (I've probably read this 15 times at least)
• A Wrinkle in Time by Madeline L'Engle
• Alas, Babylon by Pat Frank
• All of the Narnia books by C.S. Lewis
• Every Agatha Christie novel I own except The Big Four, Passenger to Frankfurt and the one set in ancient Egypt
• Emma by Jane Austen
• Pride and Prejudice by Jane Austen
• Gaudy Night by Dorothy Sayers
• The Screwtape Letters by C.S. Lewis
• The Witches by Roald Dahl
• Dog Friday by Hilary McKay
• State of Fear by Michael Crichton
• Twelfth Night by William Shakespeare 
• The Wind in the Willows by Kenneth Graham
• From the Mixed-Up Files of Mrs. Basil E. Frankweiler by E. L. Konigsburg 

What does this list - which I intend to add to as I remember things - say about my taste?  I really don't know.