Cujo

The number-one national best seller for Stephen King's rabid fans, Cujo "hits the jugular" (The New York Times) with the story of a friendly Saint Bernard that is bitten by a sick bat. Get ready to meet the most hideous menace ever to savage the flesh and devour the mind.
Cujo is a 200-pound Saint Bernard, the best friend Brett Camber has ever had. One day Cujo chases a rabbit into a cave inhabited by sick bats. What happens to Cujo, how he becomes a horrifying vortex inescapably drawing in all the people around him, makes for one of the most heart-stopping novels Stephen King has ever written.