A maverick artist is rediscovered in Paris when his taboo-busting 1967 film resurfaces in the art world. Robert Cordier’s movie about medicine and the body made 20,000 faint at the Montreal world’s fair. Ghost Artist unmasks it as an avant-garde work for the masses inspired by collaborations with legendary artists like James Baldwin, Andy Warhol, Allen Ginsberg, Jean Genet and Salvador Dalí. Gho...