Anna Karenina. Nothing mind-blowing. I didn't see a light in the sky.
I read a lot, fiction and non-fiction. When I read Tolstoy, I remember thinking "What sort of dark magic is this?" He drew characters in a way I haven't seen since. I _knew_ these people.
I remember this book, decades later. I remember a lot of what I've read, but Tolstoy was the man. I have no idea how or why his magic worked.