I purchased this a few years ago. I read and studied this book during a period when I was experiencing mental stress. It's very easy to understand and read, so I finished it in no time. I've only read it once, and it's in good condition. This book is recommended for people who want to strengthen their mental health, those who don't know how to relieve stress, and more. *Please refrain from price negotiations. Thank you very much. m(__)m