Book excerpt: Parenting a teenager is tougher than ever, but new brain research offers new insight into the best way to connect with teens. With humor, wisdom and a deep understanding of the teenaged brain, noted teen expert Dr. Laura Kastner shows parents how to stay calm and cool-headed while dealing with hot-button issues everything from rude attitude and lying to sex and substance use -- with clear, easy-to-follow suggestions for setting limits while maintaining a close and loving relationship. Find out why Dr. T. Berry Brazelton calls Getting to Calm required reading for any parent who struggles with their teen.