My dad was a type-setter in the hot metal printing days. I’ve had the pleasure to sit at a linotype. The typesetter was also a proofreader, imagine proofreading backwards text*. Font selection was a big thing, fonts were copyrighted. You can see some legacy in the O’Reilly technical books, they talk about fonts and colophons, and such as are important to publishers.
And you gotta be luvin' Le Carre.
* I have an early Huckleberry Finn book with the typo “the carpenter picked up his was.”