People used to call them 'friends' and said that they were good for your brain. And then a day came when all that changed when they became the enemy.Now, anyone found harbouring a rogue imaginary person is in for the Cosh - an operation that fries the imagination and zaps whatever's in there out of existence. That's why Joseph wishes Klaris Cliff had never shown up, and why he knows that proving her innocence is the last hope he has of saving himself and his friend Flea. As Joseph turns detective to avoid the Cosh, he finds about more than he had bargained for about Klaris and what she means to him.

 

This book is part of a book series called Rollercoasters .

There are 256 pages in this book. This book was published 2015 by Oxford University Press .

Nikki Sheehan is a freelance journalist and a mentor at Little Green Pig, helping young people to be creative with words. Her previous book, Swan Boy, was nominated for the Carnegie Medal. She has three children and lives in Brighton.