The Broke and the Bookish!
I do like a book that makes me think. That challenges what I thought were Iron Clad beliefs and ideas. To enlarge my world and help me understand it better or wonder what the heck is happening to it more. Depends on the case. These are the tough topics.
So here's my list. In no particular order. I haven't read Johnny Got His Gun yet but my daughter did and she said that book for certain will never ever leave her.
Silent Spring - Our Environment - she won that one! (Although not fiction)
Looking For Alaska - spoiler
Push (Precious) - abuse, ignorance, prejudice, just how harsh our own streets can be.
The Jungle - because we are what we eat.
Johnny Got His Gun - to stop all the romanticizing of war. period
The Shack - our own theology and how we relate to it. The Who, The What, The Why Why Why!!
Those are mine. I like it when writers keep writing strong, in-your-face pieces about how they see the world and what makes them outraged or saddened by it.
I'll look forward to seeing your lists!