The one that probably changed my mind was "The Bell Jar" by Sylvia Plath! I bought it at a time when I was super depressed, and then it made me feel better knowing that medicine in the depression and psychiatric field have greatly advanced (she gets aggressive shock therapy, brutal).

What's a book that changed your life the most?

Tuesdays with Morie. It's about a dying professor and his zest and passion for life. He held on until th every found. His story has profoundly affected me and I've resolved never to have setbacks and darker moments affect my outlook in life.