"Stranger in a Strange Land"by Robert A. Heinlein. It's a science fiction book, but it made me question everything, made me change my way of thinking towards a

"Stranger in a Strange Land"by Robert A. Heinlein. It's a science fiction book, but it made me question everything, made me change my way of thinking towards a lot of concepts, and integrate those new concepts it in my life. I can definitely say it changed my life.