Mason & Dixon: A Novel by Thomas Pynchon tells the story of Charles Mason (1728-1786) and Jeremiah Dixon (1733-1779), renowned British surveyors whose work defines the border between Pennsylvania and Maryland today as the Mason-Dixon Line. Pynchon reimagines their lives, weaving a tapestry that includes Native American cultures, frontier settlers, and the turbulent landscapes of both body and mind. The narrative unfolds through the eyes of two men with contrasting temperaments—Mason, rollicking and exuberant, and Dixon, depressive and Gothic—each navigating the challenges and contradictions of their era. Set against the backdrop of pre-Revolutionary America, the novel traverses from Cape Town to revolutionary hotspots, exploring themes of eroticism, political conspiracy, and the dark underside of the Enlightenment. With 784 pages of intricate storytelling, Mason & Dixon is a vivid exploration of human nature in an age of reason.