Tips on how to control this bizarre species by (undiscovered) genius, Katie Sutton! Katie is an expert on operating grown-ups. She knows exactly how to get the best out of them, so she decides to write a guide to help the world's long-suffering teenagers do the same. But then Katie's mum starts dating the awful Yellow Tie Man. Suddenly Mum's acting completely out of character and totally out of control! For everyone's sake, Katie needs to use all her expertise to get rid of him - and quick!