Physical books, all the way. I'm a techie, through and through -- I'm a computer programmer by trade, and as soon as I can convince these stupid smart bulbs to work with Home Assistant I'm very excited to have a smart home -- but I'll take a physical book over a digital one any day of the week. If I must read something on a computer, I pirate it. Physical books are easier on the eyes (and e-ink displays, though they've made massive strides over the last several years, still lag well behind their old-fashioned counterparts in terms of color rendering (and in some cases even black-and-white readability) and are still prohibitively priced), and more importantly, you can't put DRM on a piece of paper. I'm a huge believer in owning what I buy.