The author of four truly important novels-- The Recognitions in 1955, J R in 1975, Carpenter's Gothic in 1985, and A Frolic of His Own in 1995--William Gaddis is considered by many literary scholars to be one of the most outstanding novelists of the twentieth century, to be spoken of in the same breath as James Joyce, Robert Musil, and Thomas Pynchon.     Hints and Guesses: William Gaddis's Fiction of Longing is the first scholarly work to discuss all four Gaddis novels. While not dismissing the inclination of many scholars to view Gaddis's fiction as postmodern, Christopher Knight moves critical response in another direction, toward a discussion of Gaddis's significance as a satirist and social critic. Knight investigates Gaddis's predominant thematic interests, including those of contemporary aesthetics, Flemish painting, forgery, corporate America, Third World politics, and the U.S. legal system. What Knight finds is an author not only acutely sensitive to post-war social realities but also one whose critique carries with it an implied utopian dimension.