"Happiness Power, How to unleash your power and live a more joyful life" by Robert Gill, JR.
This book is a practical guide to the power of Happiness and how we can utilise it in everyday life. It relies on medical and psychological studies to back up the premise that being happy has a physical and mental effect on our everyday lives.
Its easy to read and packs in lots of details, some that are obvious but others that we might not have given to much thought to. Its not a long read, but definitely worth a look.