The best-selling Australian GO GIRL series is back and bigger than ever! Everyone loves a sleep-over, whether it's with your besties, on school camp, or even at home with your big sister! Join Cassie, Sophie and Olivia in this bumper collection of Go Girl favourites. In Sleep-over!, Olivia is starting to feel really worried about her first sleep-over. She's thought up a hundred things that could go wrong! In Camp Chaos, Sophie makes a new friend when she is swapped into another class at school. But will she be forced to choose between her new bestie and her old bestie? In Sister Spirit, Cassie's had a disastrous haircut, and her big sister Hannah was the hairdresser! So it's only fair to play a trick on Hannah to get her back, isn't it?