There's a reason that the number thirteen is bad luck: it sucks to be thirteen. You're definitely not a kid anymore, but your parents still treat you like one. No-one escapes thirteen unscathed - not even the best looking, most popular people with straight white teeth. The best you can do is be true to yourself, even when everything's changing. Girl v the World is a funny and inspiring series about thirteen-year-old girls taking on the world. Because you've got to be strong to take it on! Erin doesn't get what all the fuss is about. When did boys stop being friends and start being boyfriends? Why are all the girls in her year shaving their legs and slopping goop on their faces? And since when did her big sister start keeping secrets about her love life? Erin's never been afraid of doing her own thing – but she never thought she'd be deliberately left out. What's everyone's problem?