I've been focused on psychology lately and getting a lot of juice from this author,...came across her timeline and it's been speaking to me. It's not directly trading related but for me, I'm pushing against limitations in peak performance and her content has been providing some ancillary insight: Perhaps others would find benefit or provide links to similar authors and resources.
I read the free version. It’s succinct and I found some of the concepts really helpful in developing my own psychological management system.