I just finished this really interesting and easy-to-read history of the history of the telegraph, and I think the Stacker.news crowd might like it quite a bit. The history of the telegraph is the history of how the world went from the fastest communication going at the pace of a speeding horse, to almost-instant communication for much of the world. This happened within a few decades. It's that Zero to One thing, like in Peter Thiel's book of the same name.
Also there were some tidbits in here that I'd never heard of. The most interesting was that before the electric telegraph, an OPTICAL telegraph system was used in Europe, and was fairly widespread. It's exactly what you might think - a string of towers on hills, with operators looking at neighboring towers with telescopes. They started in around 1790, and were there were a few different designs - here's 2 of them: