Rats

It was only when the bones of the first devoured victims were discovered that the true nature and power of these swarming black creatures with their razor-sharp teeth and the taste for human blood began to be realised by a panic-stricken city. For millions of years man and rats had been natural enemies. But now for the first time - suddenly, shockingly, horribly - the balance of power had shifted...'The effectivenes of the gruesome set pieces and brilliant finale are all on its own' Sunday Times