This is a three-volume boxed set of some of the novels in the Three Musketeers series.
The works represented here are the individual, unabridged novels:

The Three Musketeers
Twenty Years After
The Man in the Iron Mask

Historical adventure has rarely been more swashbuckling than in the tales of d’Artagnan, Athos, Porthos and Aramis. Pursuing deadly foes and female affections with equal vigour, they play a heroic role in nearly half a century of turbulent French history, rubbing shoulders with such personalities as Cardinal Richelieu, Louis XIV and Oliver Cromwell along the way.

The saga begins in 1625, when a headstrong young man from Gascony arrives in Paris to seek fame and fortune. Within days his swordsmanship has won him the respect and friendship of three of the King’s most brilliant musketeers.

In Twenty Years After, the friends join forces once again in an audacious plan to rescue King Charles I from the executioner’s block.

The saga concludes in the 1660s with The Man in the Iron Mask. Louis XIV’s colourful and calculating court provides the setting for their last adventure, the rescue of Philippe, the King’s twin brother. Alexandre Dumas was one of the most fêted authors of 19th-century France, and his books are still among the best-loved and thrilling adventures ever written.