The "d'Artagnan Romances" is a series of historical novels written by French author Alexandre Dumas. The most famous book in the series is "The Three Musketeers," published in 1844, which follows the adventures of d'Artagnan, a young and ambitious swordsman, as he joins forces with three musketeers: Athos, Porthos, and Aramis. The story is set in 17th-century France and explores themes of friendship, loyalty, and honor. The series continues with sequels like "Twenty Years After" and "The Vicomte of Bragelonne," which further develop the characters and their exploits. The novels are known for their engaging plots, rich historical context, and memorable characters, making them enduring classics in world literature.