The Human Body: When I was a kid, I was in love with this 1983 pop-up anatomy book, by Jonathan Miller and David Pelham. It had movable flaps that could demonstrate how, say, light is refracted by the human eye or how joints move within their sockets. I would spend hours opening and closing the front cover to make the jaw hinge up and down or playing with layered spreads, where you first lifted up the musculature, then the ribcage, then the lungs to reveal a bisected heart.