W. Somerset Maugham's 1944 novel follows Larry Darrell, a young American pilot returning from World War I who refuses the conventional path of marriage and career to embark on a spiritual quest that takes him from Chicago to Paris to India. Unlike his friends who pursue wealth and social position, Larry seeks meaning and transcendence, studying philosophy, working manual labor, and eventually finding illumination in an Indian ashram. Maugham narrates the story himself, appearing as a character who encounters Larry and his circle of friends across decades and continents. The novel examines the American expatriate community in Paris between the wars, contrasting Larry's ascetic search with the materialism of characters like Elliott Templeton, a social climber of exquisite taste, and Isabel Bradley, who loves Larry but cannot accept his rejection of conventional success. Maugham draws on his own travels in India and his skeptical but curious approach to Eastern spirituality, creating a protagonist who achieves genuine enlightenment without becoming a saint. The title comes from the Katha Upanishad's description of the spiritual path as narrow as a razor's edge. Through Larry's journey and the fates of those around him, Maugham explores whether spiritual fulfillment and worldly happiness can coexist, and whether the examined life is truly worth the sacrifices it demands.