I just added the entire back catalog of one of my favourite journals, “Living Reviews in Relativity”, to the Academic Reader. It’s not part of the default feed set, so you’ll need to click on “Find more external feeds”, near the top of the left-hand column, if you want to add it. The journal publishes only a few articles per year, so it’s not a particularly active feed. But the articles are usually very good, so if you’re interested in relativity, it’s worth adding to your feeds.