The Three Musketeers (French: Les Trois Mousquetaires) is a novel of adventure fiction by Alexandre Dumas, père. It is the story of a young man named d'Artagnan. He leaves home to become a musketeer of the guard of King Louis XIII of France. He and his friends Athos, Porthos, and Aramis live by the motto, "One for all, and all for one" (French: Un pour tous, et tous pour un!).
The Three Musketeers was first published in serial form in the magazine Le Siècle between March and July 1844. All the books sold well and made plenty of money for Dumas. The story was later made into several plays and movies.