books about personality

Has anyone else began reading this? I found myself perplexed at picking up this book at this particular part of my mbti/ life journey as I was literally feeling science was failing spirituality and vice versa. Wondering if it would be acceptable to start a thread off of the topic of this work.

Hey, I'm not sure if I'm posting this in the right place, but I need some advice about which book to buy. I want to buy a book about cognitive functions, temperament and personality types. Which one would you recommend? I'm thinking about buying "Please Understand Me II" by David Keirsey. Would...