In their 3rd Edition of Developing Mental Toughness, the authors have taken their decades-long investigation into defining, describing and developing mental toughness to the next level. Thoughtfully updated for the third decade of the 21st century, it includes new assessment tools such as the MTQ Plus, deeper explanations of the critical components of mental toughness, updated case studies, and hints toward the direction of future developments in mental toughness with the leveraging of the latest technologies and digital applications. As a former special operations military officer, professional educator and mental toughness practitioner, this edition becomes my new cornerstone reference.