The Chrysalids cover?

I read The Chrysalids when I was about 14, at school (well about half, my teacher gave up on it as no one else in the cl liked it), anyway recently I bought it and re-read it (and finished it). When I was reading the book there is a part in it when David (the main character) saves his little sister from a Mutant that has chased her up a tree and is eating her horse. When they described the Mutant (something not completely unlike a tiger or cheetah but with some differences etc) I suddenly remembered the front cover of the book I had read at school. It is now an image I can't seem to get out of my head, I tried to find this cover on google and google images but can not. Can anyone please help me find it?