StrengthsFinder 2.0 by Tom Rath is a powerful tool to help you identify and develop your unique talents. It is based on the Clifton StrengthsFinder assessment, which has been used by millions of people around the world to uncover their natural talents and strengths
From Wikipedia
Tom Rath is an American author and a consultant on employee engagement, strengths, and well-being. He is best known for his studies on strength-based leadership and well-being and for synthesizing research findings in a series of bestselling books. His books have sold more than five million copies and have been translated into 16 languages.