The Power Of Now (Eckhart Tolle)
I still refer back to this book regularly, even though I read it many years ago. Eckhart Tolle's The Power Of Now is a manual for life, a reminder that living in the now is the truest path to happiness and enlightenment.
This book will teach you to become conscious of how thoughts and emotions get in the way of your ability to live in genuine peace and happiness, and how to cope with the sporadic nature of mind.
It is the definitive guide to “being present” and gives you a completely new take on life itself.