So properly justifying text for a print layout is hard. For example on the right page, the sentence that starts with “Marcos wondered”.

You start to see how in the first line it’s fairly widely spaced but the second line starts to look like the line was crammed in to fit the line.

It’s subtle but those are the kinds of things that proper print layout tools help with. It’s weird looking at one page in a vacuum you won’t notice as much but after a few pages it starts getting “harder” to read. I’ve noticed this with some E-books and started to pick up on it.

Those are just like (almost) all books. "Proper" typesetting like LaTeX does seems to only be a thing in a very small subset.

See the RHS of the page, see the column of space after "detected gunfire" and "counterinsurgents".

In fact, the spaces are all over the place.