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Atlas Shrugged by Ayn Rand
The Fountainhead by Ayn Rand
The Walking Drum by Louis Lamour(along with everything else by Louis Lamour)
Unintended Consequnces by John Ross
In the Gravest Extreme by Massad Ayoob
Bury My Heart at Wounded Knee by Dee Brown
1984 by George Orwell
Catch-22 by Joseph Heller
The Super System By Doyle Brunson
Ender's Game/Ender's Shadow by Orson Scott Card (As much as an author has to put themselves into their books, I still find it amazing that the same author could write the exact same story, but from two seperate view points, and have the book still turn out great.)
Freakonomics by Stephen D Levitt
Most of John Grisham's books.

Many, many others, but those stand out at the moment.