Did anyone read 2"poker-psychology" from Alan Schoonmaker?

Hi! I would be interested to know if any of you have read Dr Alan Schoonmaker's book and have also thought about or are working on self-reflection?
I find it very exciting, because basically the book describes very well what some talented poker players have and what others just have to acquire through such books.

Do you have any other good books as suggestions that deal with this topic? Psychology etc.
I also find it interesting that Stu Ungar was mentioned in this book.
I personally think his eyes have similarities to Fedor Holz's. Maybe they both have something in common?

My friends highly recommended Jared Tendler's book, The Mental Game of Poker. But unfortunately I really lack free time, so I didn't even start reading it.