Grinny, by by Nicholas Fisk

"A real sci-fi book for kids. I remember my father reading this book to me as a child and finding it really scary but loving it at the same time. In fact I read it over and over. I sought it out to read to my nine and ten year old and they both loved it too." "It's still scary and thrilling with a gripping tale." "The story of two children overcoming the strange forces of weird 'grinny'. It's a great book for any kids who are in to all things scary!"