The Scarlet Letter , an 1850 novel, is a work of historical fiction written by American author Nathaniel Hawthorne. It is considered his "masterwork". Set in 17th-century Puritan Massachusetts Bay Colony, during the years 1642 to 1649, it tells the story of Hester Prynne, who conceives a daughter through an affair and struggles to create a new life of repentance and dignity. Throughout the book, Hawthorne explores themes of legalism, sin, and guilt.