I never read digital if at all possible. It is just not the same, and besides after a page or two my eyes seem to go in strike.
I have just finished " Into the Silence: The Great War, Mallory, and the Conquest of Everest " by Wade Davis. The book, about the first English expeditions to Everest was so heavily laced with WWI history that I ended up having several of my history books beside me for reference while reading. I cannot imagine that being a convenient option without having more than one digital reader