He put years into making this book, you want to read it ("love"), but you won't buy it because he wants to protect his labor of love? (Not interested in arguments why DRM is ineffectual as it has no bearing on this).
Buy the paperback. I just did. If you would really and truly "love" to read it, then buy it.
But really, is the DRM just an excuse? A reason not to part with $32 dollars? A way to virtue signal that you are appreciative of his work without actually showing that appreciation in the only way that matters?
(I didn't mean for this argument to become a larger criticism of how people act to new products and services in general; but I guess that's what it has become).