Around the globe, people mourned the loss of a man who had stood for peace, a man who had given so much joy to the world through his gift of music. No one had seen it coming…except one man—Mark David Chapman, Lennon’s assassin.

What drove this former Beatles fan to commit such a terrible act? Follow the lives of both Lennon and Chapman, learn about the political and cultural settings in which both grew up, and trace—step by excruciating step—the final moments of John Lennon’s life.

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