The first book in The D’Artagnan Romances. The Three Musketeers is set in the 17th century; it recounts the adventures of a young man named d'Artagnan after he leaves home to travel to Paris, to join the Musketeers of the Guard. D'Artagnan is not one of the musketeers of the title; those are his friends Athos, Porthos and Aramis, inseparable friends who live by the motto all for one, one for all, a motto which is first put forth by d'Artagnan.