The author of "The Happiness Advantage" is Shawn Achor. In this book, Achor explores the idea that success doesn't necessarily lead to happiness, but rather happiness leads to success. He delves into research from the fields of positive psychology and neuroscience to offer practical strategies for individuals and organizations to cultivate a positive mindset and improve overall well-being. Achor's work has been widely acclaimed for its insightful and actionable advice on how to leverage the power of positivity to achieve lasting success and happiness.

The message of The Happiness Advantage is that focusing on positivity and happiness can lead to increased success, productivity, and overall well-being. By adopting a positive mindset and incorporating simple happiness-boosting habits into our daily lives, we can improve our performance in various areas and ultimately lead a more fulfilling and successful life.

1. "Happiness is not the belief that we don't need to change; it is the realization that we can."