I don't have many clues to identify this, but I was sitting next to someone on the tube recently who was reading a kindle book about teenagers and why they behave the way they do, tips on how to deal with stroppiness, mood swings, unreasonableness, etc. I didn't want to admit to reading over her shoulder, so didn't ask the title. I've looked on Amazon and there are dozens of books on this topic - can anyone recommend one?