The Mystery of the Economy Borough Silver Mine
Martin, Anya / Haggerty, Charlotte / Schmitt, Ziva![The Mystery of the Economy Borough Silver Mine](https://support.digitalhusky.com/media/annotations/sorted/303/30333181/CHSBZCOP0330333181.jpg)
Three girls go on a quest to discover the truth of the silver mine legends in their local park. They recruit the help of "The Geologists, " science superheroes that lead them to discover clay, sandstone, and the riches that lie beneath the ground and in the history of their community.