Friends and enemies - sometimes it's hard to tell the two apart. Especially when some people seem to be both. In her bestselling book "Mean Girls", Hayley DiMarco counselled teens about how to handle mean girls at school or church who were making their lives miserable. But what's a girl to do when her own friends are the ones doing those mean and hurtful things - being her BFF one day but betraying her the next? "Frenemies" helps girls figure it out. In this new book from big-sister mentor Hayley DiMarco, teens will learn why friends act the way they do and how they should react when the mean people in their lives are the people they love and trust the most.