My friends and I liked this book enough to make a digital art project based on it!
https://mindsetscouts.com/
I use http://feedly.com/ , mostly because I had a robust RSS feed when Google used to come with one, and Feedly volunteered to transfer over RSS accounts when it was shutting down to capture users. I don't have any complaints.
As a physicist, I'd like to say that if you're tempted by inaccessible cardinals, you will still end up mucking about with them, much to the annoyance of some of your cohort.
Why did this happen? I feel like people who already know about circling probably know the answer to this, but that people who don't probably don't (I'm in the latter group).