To fully enjoy O Brother, Where Art Thou? it not only helps to have a passing familiarity with Homer’s The Odyssey, on which the movie is loosely based, but also the films of Preston Sturges (whose Sullivan’s Travels gives the movie its title) as well as any other movie that could even remotely be described as "southern" or "gothic." The Coen brothers, in their first movie since The Big Lebowski, borrow lightly from these many and varied sources to form a pastiche so derivative in nature that you will find yourself wondering just what exactly O Brother, Where Art Thou? is supposed to be.