This quote from Open Culture describes an interesting reading habit of Marshall McLuhan.
"No doubt about it, Marshall McLuhan was a cryptic thinker and a bit of an odd duck. Earlier this week, Colin Marshall brought you an Introduction to Marshall McLuhan, presented by Tom Wolfe (best known for The Electric Kool-Aid Acid Test and The Bonfire of the Vanities). In putting together that post, we stumbled upon another gem of a video, a testament to McLuhan’s quirkiness — and we mean that in the best possible way. Above McLuhan, kicking back on a couch, reveals his “peculiar reading habit,” admitting: “If it’s a frivolous, relaxing book, I read every word. But serious books I read on the right-hand side only because I’ve discovered enormous redundancy in any well-written book, and I find that by reading only the right-hand page this keeps me very wide awake, filling in the other page out of my own noodle.” There’s a bit of hubris in that approach, but also a certain amount of creativity too. Perhaps you’ll want to give it a try."
I have always told my students to only red assigned books until they start to repeat. I share McLuhan's view that serious (academic) books tend to be very repetitive. I love the idea of having the students only read the right hand pages and figure out the missing arguments from the left hand pages. That would be a spectacular exercise in critical thinking.