Maybe take a walk to your nearest bookshop, buy it with a face to face conversation and read it in a quiet outdoors spot?

So he should engage in somewhat anti-minimalism behavior to read book about digital minimalism?

Actually that would be a very digital-minimalism behavior. Minimal digital, and more analog...

Digital minimalism to me is using the minimum viable digital footprint as part of minimising my meatspace footprint. Which I am admittedly terrible at. But I still think it's a good idea :) I <3 My Kindle tho, I prefer my fiction as audio and non-fiction on ebook. My dead tree library is mostly out-of-print computing / programming texts from the 60s-80s.

Maybe he could replace the other book in his e-reader with this one?