Postmodern literature emerged in the late 20th century, challenging traditional notions of truth, reality, and storytelling. It embraces relativism, questions grand narratives, and blurs boundaries between high and low culture, often incorporating elements of popular media into complex, fragmented narratives. Key authors like Thomas Pynchon, Don DeLillo, and David Foster Wallace use experimental techniques to explore themes of identity, consumerism, and technology's impact on society. Their works feature non-linear narratives, metafiction, and intertextuality, pushing readers to question assumptions about literature and reality.