Our "30-is-the-new-20" culture tells us that the twentysomething years don't matter. Some say they are an extended adolescence. Others call them an emerging adulthood. But 30 is not the new 20. In this enlightening book, Dr. Meg Jay reveals how many twentysomethings have been caught in a swirl of hype and misinformation that has trivialized what are actually the most defining years of adulthood.

Drawing from more than 10 years of work with hundreds of twentysomething clients and students, Dr. Jay weaves the science of the twentysomething years with compelling, behind-closed-doors stories from twentysomethings themselves. She shares what psychologists, sociologists, neurologists, reproductive specialists, human-resources executives, and economists know about the unique power of our 20s and how they change our lives. The result is a provocative and sometimes poignant listen that shows us why our 20s do matter. Our 20s are a time when the things we do - and the things we don't do - will have an enormous effect across years and even generations to come.