The Defining Decade: Why Your Twenties MatterDrawing from almost two decades of work with hundreds of clients and students, The Defining Decade weaves the latest science of the twentysomething years with the behind-closed-doors stories from twentysomethings, themselves. The result is a provocative read that provides the tools necessary to make the most of your twenties, and shows us how work, relationships, personality, social networks, identity, and even the brain can change more during this decade than at any other time in adulthood—if we use the time wisely.