'At this game, whoever does not kill is killed.' Twenty Years After (1845), the sequel to The Three Musketeers, is a supreme creation of suspense and heroic adventure. Two decades have passed since the musketeers triumphed over Cardinal Richelieu and Milady. Time has weakened their resolve, and dispersed their loyalties. But treasons and stratagems still cry out for justice: civil war endangers the throne of France, while in England Cromwell threatens to send Charles I…