"The Fair Maid of Perth: St. Valentine's Day" is an 1828 historical novel by Sir Walter Scott, set in Perth and other parts of Scotland in the year 1400. The story revolves around Catherine Glover, known as the Fair Maid of Perth, who is caught between the love interests of two powerful men, the Duke of Rothesay and Henry Smith, a wealthy armorer. The novel is based on the true historical event of the Battle of the North Inch, which took place on St. Valentine's Day in 1396. Scott drew on several sources from the 14th and 15th centuries, including narrative poems by John Barbour and Blind Hary, and historical works by John of Fordun, Walter Bower, Andrew of Wyntoun, and Hector Boece. The novel is praised for its vivid characters, romantic tension, political intrigue, and accurate depiction of life in medieval Scotland. 'The Fair Maid of Perth' is considered one of Scott's finest works and a classic of historical fiction.