"Kavalier & Clay" is a novel by Michael Chabon that follows the lives of two Jewish cousins, Joe Kavalier and Sam Clay, in New York City before, during, and after World War II. The story explores their creation of a popular comic book superhero, reflecting their struggles with identity, family, and the impact of the war. The novel delves into themes of escapism, creativity, and the immigrant experience in America. It also highlights the rise of the comic book industry, showcasing the cultural significance of superheroes during a tumultuous period in history.