In this final installment of New York Times bestselling author Dan Gutman’s Flashback Four series, four brave friends head back in time to record the most infamous duel in U.S. history.Finally, the billionaire Miss Z is ready to unveil the photos captured by the Flashback Four at her museum’s grand opening! There, Luke, Julia, David, and Isabel learn that everyone thinks Miss Z is a fraud and that their photos are fake. Though they desperately want to clear her name, no one can know the truth.With Miss Z officially out of the picture, a top-secret agency steps in and sends the team on one final mission—to videotape the fateful duel between Alexander Hamilton and Aaron Burr. But when the kids arrive in 1804, they face a difficult question: Should they capture the tragic details of the duel, or try to change them?Dan Gutman’s signature blend of fascinating facts, humor, and action make this series finale an adventure of historic proportions