I spent my final 3 hours reading W. Bruce Cameron's 8 Simple Rules for Dating My Teenage Daughter. As the mother of a teenager and a preteen, I found this book absolutely hilarious and sadly all too true. Here's a typical morsel of wisdom from Cameron: "The teenage years represent a formative period in which your daughter goes from wasting money on childish things to learning how to waste money like an adult. Your job is to fund this process." I tried to persuade Todd to read this book, as it is written from a father's perspective. However, he probably feels he is too busy surviving the arduous process to read the survival guide.
While we're on the topic of how to cope with a teenager, a truly useful book is Get Out of My Life, but First Could You Drive Me & Cheryl to the Mall? This book had been recommended to me by a number of people, and it offers good, practical advice, written in a succinct manner. Of course, even after all this reading, I still don't feel like I understand the mind of a teenage girl (despite the fact that I was one a few decades ago). If you ask Julia, she'll probably tell you it's equally difficult understanding and coping with parents.