The Man in the Iron Mask by Alexandre Dumas

In a daring plot involving royal twins, the Musketeers uncover a secret prisoner hidden behind an iron mask—whose existence threatens the throne itself. As loyalties are tested, the friends face impossible choices that alter the course of history. The plot blends political intrigue with personal sacrifice and legendary courage. A dramatic and emotional finale to the Musketeer epic. A story of secrets, power, and the cost of truth.