A few years ago, we wrote YOU: The Ownerās Manual, which taught people about the inner workings of their bodiesāand how to keep them running strong. But you know what? Thereās a big difference between an adultās body and your body, between adultsā health mysteries and your health mysteries, between their questions and your questions. So, teens, this book is for YOU. Weāll talk to you about the biological changes that are happening in your brain and your body. Weāll show you how to get more energy, improve your grades, protect your skin, salvage more sleep, get fit, eat well, maximize your relationships, make decisions about sex, and so much more. In fact, in these pages, we answer hundreds of your most pressing health-related questions. And you know what else? We are going to treat you like adults in one very important way: Weāre not going to preach. Weāre going to give you straight-up information that you can use to make smart choices about how to live the good lifeāand enjoy every second of it. Starting right now.