There are only three rules in the Museum of Human History:
1. Never tell anyone about the museum, or any of its secrets.
2. Follow Mr. Steel’s instructions with exactness.
3. Never lie to Mr. Steel.
In all the time that eleven-year-old Mariana has lived in the museum and hunted for the superpowered artifacts of ancient American Legends, she has strictly followed all of the rules. She knows that if she doesn’t, Mr. Steel, the mysterious museum curator, will banish her.
But the day that she stumbles upon a family being attacked by a giant tarantula in the desert ruins of Philadelphia—the same day she finds the ancient bifocals of Benjamin Franklin and becomes best friends with his ghost in the process—she breaks every single rule.
The consequences? Miss Murphy, Mr. Steel’s oldest enemy, who is hell-bent on destroying the museum, discovers their whereabouts. Their only escape? Finding the boots of Butch Cassidy, which grant their bearer the power of the perfect getaway.
Together, Mariana, Mr. Steel, and Benjamin Franklin must walk the path of Butch Cassidy’s final days and discover the Legendary outlaw’s secret fate. But as the threat of Miss Murphy approaches, will Mariana risk her friends’ lives in order to keep her lie a secret?
