The Happiness Advantage: The Seven Principles of Positive Psychology That Fuel Success and Performance at Work by Shawn Achor

This is absolutely a must read for all professionals. This is a very scientific book that goes in depth into positive psychology. Want to get more done at your job, have happier and healthier coworkers, make work a calling as opposed to a job then this book is a must read for you! The basic thesis is that happiness leads to success and not the other way around. This book is transformative for positive and progressive workplace motivations.