I've been trying to collect my thought on what my changers would be. Here's the short list (in random order):
"Alchemist" by Paolo Coelho. I've read it long before the Coelho boom took off in Europe (dunno how it got into my hands) and I think this is the best book by Coelho (in the later books he starts repeating himself). For me this book opened this sort of spiritual view of the world, connected thinking with the universe and the idea that your thoughts and intentions are material.
"Doctor Zhivago" by Boris Pasternak. Well, this is in fact the book about everything (destiny, faith, love, historic epic), but for me this is the book is about the philosophy of life.
"Master and Margarita" by Mikhail Bulgakov. Built my view on the true meaning of integrity of a person.
"Les Hommes Cruels Ne Courent Pas Les Rues" by Katherine Pancol. This was the best book I've read on man-woman subject (and Pancol is the best writer). When I read it it was like reading about myself, all my fears about finding Mr Right etc :-) Pancol knows the chicken side of women.
http://www.katherine-pancol.com/
"7 Habits of Highly Effective People" by Stephen Covey. I must admit, I am quite sceptical to all this 'become a leader in 10 steps/days/actions" literature. Because only 1% of them is good and the rest is just the repetition of the well-known. I guess the real purpose of all these books is not to invent something mind-blowing with every book, but to serve as an excercise for your self-awareness, you should read one of these books once a year to dust your values system etc. But Covey's book actually contains some interesting concepts, mind techniques that help a person to build a different mentality. For me some of them painted a bit different pcture of the world.