One book has made quite the impression on me... Atlas Shrugged, by Ayn Rand. It was life changing and I strongly encourage everyone to read it... either to open your perspectives or affirm them. I have adopted Ayn Rand's Objective Realism as my own view. For more information on this amazing woman, her work and philosophy, you can check out the Ayn Rand Institute.
Wanna pick my brain? Here's some of what I've been reading.