The book that changed how I see the world

I intend for this to be a discussion! Discuss! What book changed the way you see the world?

Which one to choose?

Harry Potter when I was in third grade? The Nightingale at twenty one? The Sister’s Grimm in middle school? Do I choose one from a favorite author - Fredrik Backman, Margaret Rogerson, Emily Henry? What about the horribly honest reality of The Poppy War? The ones that made me sob - Eleanor Oliphant is Completely Fine or The Song of Achilles?

The truth is that every book I’ve read has had a little role in shaping me into the human I am today. A piece of it wedges itself under my skin. I remember.