The Imaginary by AF Harrold

Rudger is Amanda’s best friend. He doesn’t exist, but nobody’s perfect. Only Amanda can see her imaginary friend – until the sinister Mr Bunting arrives at Amanda’s door. Mr Bunting hunts imaginaries. Rumour says that he eats them. And he’s sniffed out Rudger. Soon Rudger is alone, and running for his imaginary life. But can a boy who isn’t there survive without a friend to dream him up?