An "author newsletter" is a way for an author to communicate and connect with their readers. It's like a personal email or magazine sent out regularly to share updates on their books, upcoming events, and other interesting information.
I also sign up for authors newsletters and keep them coming if it includes more than just book info. (russellblake.com)
Author newsletters help you build relationships with your reading audience. (aer.io)
Some of our posts have mentioned author newsletters, and they are incredibly useful tools for authors, but a lot of authors still don't have newsletters. (mybookcave.com)