The Four Agreements: A Practical Guide to Personal Freedom

The Four Agreements: A Practical Guide to Personal Freedom
Miguel Ruiz

From Amazon:

The author uses ancient Toltec wisdom to fashion a personal philosophy around these four principles--be impeccable with your word, don't take anything personally, don't make assumptions, and always do your best. 100,000 first printing. Original.

Goodreads reviews

Every week, for over a year, Alessandro asked his friends, colleagues, and acquaintances that are part of his social networks (Twitter and LinkedIn) the following question:

"What is the book that changed your life? (not novels or religious texts)"

I think it's a wonderful way to connect in a less superficial way and learn a little more about each other. It's also a wonderful way to discover new books worth reading.

This is one of them. The full list is here.