The Future Book
In this article from 2018 “walking Japan guy” Craig Mod shares great thoughts on the digital book experience and also connect it to newsletters as a thing. I would argue, not much has changed since then. The article is still a good read for every Kindle owner and current or potential newsletter writer.
I like this quote from Robin Sloan about newsletters, which I find is still relevant:
I think any artist or scholar or person-in-the-world today, if they don't have one already, needs to start an email list immediately.