Pete Johnson 
Frighteners [EPUB ebook] 

On the back of the picture were two words which jumped right out at me: THE FRIGHTENERS… When Chloe starts at a new school, she gets off to a really bad start and no-one wants to be her friend – except Aidan. But everyone else seems scared of Aidan – scared of the pictures he draws. Chloe can’t imagine why until she picks up one of his drawings of 'The Frighteners’. For now the Frighteners – horrifying monstrous creatures – won’t leave her alone…