Can you recommend 10 of the best books of all times for a young reader?

I have a 14 years old, worldly and eager to eat the world at big bites, curious of politics, God, social ills and world events....can you help me put together a list of 10 masterpieces of Universal literature for him??? he's read so far all the staples of younger minds, I am looking for something more substantial without going overboard...