In your own space, share a book/song/movie/tv show/fanwork/etc that changed your life. Something that impacted on your consciousness in a way that left its mark on your soul.
I'm not sure if the simple act of reading a single book ever changed my life. However, I do have to say that the Harry Potter series changed my life in huge, significant ways.
It showed me that I can write. It taught me how. It gave me fandom, it gave me people -- it gave me all of you. I can honestly say that all of my close friends I met through Harry Potter fandom somehow. I don't have many friends near me. I have two coworkers I go out for drinks with, and I have my family. The nearest person I visit with otherwise -- Harry Potter fan.
So Harry Potter has changed my life, not just with the book but with the people it has given and continues to give me. I'm forever grateful for that.
I'm not sure I can say any other one thing has changed my life. It has enriched it, however. I have several series I hug to myself, near and dear to my heart. Books that I go to in times of certain things. Music I listen to as well. So much music touches my heart and soul.