I recommend the entire blog. Its a chronological history of communication/computing starting at signal fires and working forward.
If it's chronological, wouldn't it be best to start at the beginning? I haven't seen a link to the "first post" yet, though it may simply be hiding from me.
To anyone looking for the same thing I was, if you go to the bottom and hit "Meta" under categories, you'll find it only contains the first blog post where he details what the blog will be about, and then you can hit next post to start there.
This is fantastic. I've been super fascinated with the Long Lines program and would love any suggestions y'all have for additional reading that's in a format like this. There's a lot of great info on long-lines.net, but I'd love more higher-level writing like this to get more historical context.