The Time Machine Girls

When two sisters find a time machine in their grandparents’ farmhouse attic, they take an unexpected journey back in time to meet famous historical figures including George Washington, Thomas Edison, Harriet Tubman, and Marie Curie. They also start uncovering clues to a family mystery that involves a trunk full of stolen items from history, their grumpy grandpa, and a ton of secrets.

This series includes the following books so far: