Being a sister isn't always easy ...but what's the very worst thing about your sister? Marty and her sister Melissa couldn't
be more different. Marty loves her Converse trainers, playing football, hiding in her secret den and helping her dad with
his DIY. But Melissa loves Justin Bieber and all things pink, girly and pretty. The sisters can manage to live together, despite
their occasional scraps but then Mum tells them they have to share a room. For Marty, having to share her bunk beds and lose
her private sanctuary turns out to be the very worst thing about having a sister. But the girls soon discover that being too
close for comfort can have unexpected consequences, and when an accident happens, the sisters realise they are closer than
The fantastic new story about having a troublesome sister, from mega-bestselling Jacqueline Wilson.