Some Book Titles, If They Were Written Today

Then: The Wealth of Nations
Now: Invisible Hands: The Mysterious Market Forces That Control Our Lives and How to Profit from Them

Then: Walden
Now: Camping with Myself: Two Years in American Tuscany

Then: The Theory of the Leisure Class
Now: Buying Out Loud: The Unbelievable Truth About What We Consume and What It Says About Us

Then: The Gospel of Matthew
Now: 40 Days and a Mule: How One Man Quit His Job and Became the Boss

Then: The Prince
Now: The Prince (Foreword by Oprah Winfrey)

(Link to The original post)
Some choice offerings from the comments:

Then: Hamlet
Now: Grieving: A 5 part study of Danish family dynamics

Then: Das Kapital
Now: Labor Value: How Today's Companies Get the Most out of Their Workforce

Then: The Art of War
Now: 13 Chapters of Highly Effective Warfare Techniques (Illustrated)

Then: Beyond Good and Evil
Now: Religion: How Christianity Changed the World... and Morality

Then: The Jungle
Now: How Not to Die During Dinner

Then: Crime and Punishment
Now: Bad Boy: Whatcha Gonna Do When They Come for You?

Then: Romeo and Juliet
Now: Forbidden Love

Then: It Can't Happen Here
Now: It Already Happened

Any other suggestions?