Books that literally changed your life?
The Great Brain series by John D. Fitzgerald. The first one, The Great Brain, is the first book that made me cry. When I finished the series, I ventured into the adult section where the author's three memoirs were. I discovered how writers change an experience to make it mean what they need it to say. I realized there is a metaphorical as well as literal way to communicate an experience. That's heavy for an 11 year old!
A Tree Grows in Brooklyn by Maggie Smith. It made that connection between reading and my own life. I experienced empathy as more than an emotion, more like an agreement between me and all people. (I was a VERY serious kid, ok!)
Franny and Zooey by J.D. Salinger It cured my suicidal teenage angst and I became a truly joyful person. (I still get depressed, sad, etc,. It was and is my bible)
Letters To A Young Poet by Ranier Maria Rilke: It taught me me to trust myself above all others. Another "bible" for me.
Until I Find You by John Irving. It opened up my heart and I reconciled with my father after years of simply tolerating him because he lived with my mother.
There might be more.