You should read the book that you hear two booksellers arguing about at the registers while you’re browsing in a bookstore.

You should read the book that you see someone on the train reading and trying to hide that they’re laughing.

You should read the book that you see someone on the train reading and trying to hide that they’re crying.

You should read the book that you find left behind in the airplane seat pocket, on a park bench, on the bus, at a restaurant, or in a hotel room.

You should read the book that you see someone reading for hours in a coffee shop — there when you got there and still there when you left — that made you envious because you were working instead of absorbed in a book.