We like to remember him for his Simpsons episode. From his Wikipedia page:
In an episode of the animated series The Simpsons, “Insane Clown Poppy”, John Updike is the ghost writer of a book that Krusty the clown is promoting. The book’s title is “Your Shoes Too Big To Kickbox God,” a 20-page book written entirely by John Updike as a money-making scam.
One of a kind.