The Friendly Orange Glow : The Untold Story of the PLATO system and the dawn of cyberculture (2017) is a really interesting book about a system few people here would probably have heard of.
this one
https://gimletmedia.com/shows/reply-all/8whoda ?
"In the early 80's, way before the world wide web existed, the French government shipped a $200 terminal to every home with a phone line, and created a service that for decades ran alongside the internet. It was called The Minitel. Producer Carla Green speaks to reporter Jean-Marc Manach, who, in the early 90's, made a living posing as a woman in sex chat rooms on Minitel. "
While i'm at it, the book 'Minitel, Welcome to the Internet' - https://mitpress.mit.edu/books/minitel is about the history of the french Minitel (previous HN discussion on the Minitel - https://news.ycombinator.com/item?id=14681561 )