Cujo by Stephen King

THE ULTIMATE BEAST IS LOOSE-AND STEPHEN KING IS SENDING HIM YOUR WAY!
A big, friendly dog chases a rabbit into a hidden underground cave-and stirs a sleeping evil crueler than death itself. A terrified four-year-old boy sees his bedroom closet door swing open untouched by human hands, and screams at the unholy red eyes gleaming in the darkness. The little Maine town of Castle Rock is about to be invaded by the most hideous menace ever to savage the flesh and devour the mind....

Condition: acceptable.