Here are some interesting rabbit holes I've found to be useful.
1. Central Banking 101 [1]. A terrific no non-sense book. The author is an ex-central banker.
2. Same author's blog[2] and twitter[3] handle is full of good insights and details.
3. Lyn Alden[4] writes well but know that she is biased towards Bitcoin which sort of clouds her writings once in a while.
[1] https://www.goodreads.com/book/show/56863052-central-banking...
[2] https://fedguy.com
[3] https://twitter.com/FedGuy12
[4] https://www.lynalden.com