The definitive book about puberty and sexual health for today's kids and teens, now fully updated for its twentieth anniversary. For two decades, this universally acclaimed book on sexuality has been" the" most trusted and accessible resource for kids, parents, teachers, librarians, and anyone else who cares about the well-being of tweens and teens. Now, in honor of its anniversary, "It's Perfectly Normal "has been updated with current and correct information on subjects such as safe and savvy Internet use, gender identity, emergency contraception, and more. Providing accurate and up-to-date answers to nearly every imaginable question, from conception and puberty to birth control and STDs, "It's Perfectly Normal "offers young people the information they need -- now more than ever -- to make responsible decisions and stay healthy.