The Shadow-Line by Joseph Conrad

A young, seaman is unexpectedly given command of his first ship. Eager but inexperienced, he soon faces a series of trials: a mysteriously cursed vessel, a dying captain, an incapacitating illness among the crew, and days of paralyzing calm at sea. Isolated and burdened with responsibility, he must rely on moral courage rather than authority or experience to lead his men. The voyage becomes a symbolic passage from youthful confidence to hard-earned maturity, marking the “shadow-line” between adolescence and adulthood.