The Stranger by Albert Camus. - One of the first books I read that dealt with existentialism. It made me question what really matters to me. "It can free you to stop feeling confined by traditional paths, and start living the way you actually want to.
Albert Camus - The Stranger. Go for a swim, miss your mother's funeral, kill an Arab, just a regular day for your existential hero. I like my pinee's selected quote here: “I opened myself to the gentle indifference of the world.