Kindle. I fondly remember reading McCann's This Side of Brightness (1998) about twenty years ago. One big part of that was his excellent use of his research and empathy for the people he encountered in the tunnels of NYC; the result was (as I recall) a powerful mix of history, engineering and present-day precarity. This gave me reason to expect he'd do the same for those who repair the fibre optic cables that now bind the world together.
And he mostly does, excepting an unnecessary binding of his tale to Conrad's Heart of Darkness (1899) and Apocalypse Now (1979). The style is first-person autofic and I guess (as with life) the author-narrator doesn't quite know what to do with his enigmatic free-diving lead character or even himself, a long-form journalist. I didn't feel he got to the heart of anything much but it was a pleasant read; the writing is great. I wish he had developed his thoughts on Samuel Beckett some more.