Thanks!: How the New Science of Gratitude Can Make You Happier paperback– January 1, 2007 by Robert A. Emmons (Author)

A proponent of the field of positive psychology offers a close-up study of the positive influence on people's lives of the systematic cultivation of gratitude, explaining how the practice of grateful thinking can increase one's chances for happiness and help one cope more effectively with stress, recover more quickly from illness, enjoy better physical health, improve relationships, and other benefits.