Cujo is a 1981 novel by Stephen King about a rabid St. Bernard Dog who becomes a threat to a trapped mother and her son. The most unusual stylistic element of the book is that it occasionally switches to the perspective of the dog, Cujo. Other than that it is a well-paced thriller with few supernatural elements. It is generally not perceived as King's best work, and at 319 pages (Hardcover Edition by Viking Press) it is one of his shorter ones.
Cujo was turned into a 1983 movie directed by Lewis Teague. The script was written by Don Carlos Dunaway and Lauren Currier.