Then: The Bible
Now: A Million Little Signs and Wonders

Then: The Sun Also Rises
Now: Drink, Bullfight, Mope

Then: Philosophiae Naturalis Principia Mathematica
Now: Why Do Apples Fall Down and Not Up? Answers From The Cutting Edge of Physics

Then: Frankenstein, or The Modern Prometheus
Now: Frankenstein: Wrath of the Supercorpse

Then: Declaration of Independence
Now: The Pursuit of Happiness: How to get control of your continent and have fun doing it!

Then: The Oxford English Dictionary
Now: Word Up! 300,000 proven ways to express yourself in speech and writing

Then: To Kill A Mockingbird
Now: To Kill A Mockingbird (A Novel)

Then: If on a Winter’s Night a Traveler
Now: A Novel: A Novel: A Novel: A Novel: A Novel: A Novel: A Novel: A Novel: A Novel: A Novel

Then: Cry, the Beloved Country
Now: Black. White.

Then: Little Women
Now: Concord 01742

Then: The Hobbit
Now: Hobbit

Then: The Art of War
Now: Call of Duty: Modern Warfare Strategy Guide

Via Kottke