Girls on the Edge: The Four Factors Driving the New Crisis for Girls-Sexual Identity, the Cyberbubble, Obsessions, Environmental Toxins” by Leonard Sax MD Ph.D. In this book, Dr. Sax explores the societal, biological, and chemical factors that are placing todays’ girls at much higher risk than in past generations. While there are one of two things I would disagree with, overall this is an excellent book. Click this link to read go to Dr. Sax’s webpage.