Nicholas Fisk, Andy Crane, AudioGO Ltd.
(AudioGO Ltd, )
Great Aunt Emma is no ordinary old lady. But why is she so strange? For a start, she just appeared, grinning, on the doorstep, as if from nowhere. Why have Mum and Dad never mentioned her before - after all, she is supposed to be Granny's sister, isn't she? Soon Tim and Beth start noticing more and more odd things about the great-aunt they've nicknamed 'Grinny'. And before long, they make a horrifying discovery. She isn't even human, she's as dangerous as a time-bomb and she has a fearful task to perform which involves them...