Sounds interesting. I've read a few self-help books over the years about dealing with emotions and what not and it's always struck me that they've taken inspiration from the stoics.So that’s what he practiced with the book basically his thoughts on how to apply it within his life and the challenges he faces.
He’s wrote it for himself as kind of a self help guide. Essentially his own musings.
Intriguing though given the leader he was and how what he was dealing with day to day as Emperor all those years ago still has relevance now to you in your own life.