Cujo is a 1981 psychological horror novel by American writer Stephen King about a rabid Saint Bernard. The novel won the British Fantasy Award in 1982 and was made into a film in 1983.
Once upon a time, not so long ago, a monster came to the small town of Castle Rock, Maine . . .
Cujo is a huge Saint Bernard dog, the best friend Brett Camber has ever had. Then one day Cujo chases a rabbit into a bolt-hole. Except it isn’t a rabbit warren any more. It is a cave inhabited by rabid bats.
And Cujo falls sick. Very sick. And the gentle giant who once protected the family becomes a vortex of horror inexorably drawing in all the people around him . .