Zo Jones is enjoying the sunny season at her Happy Camper gift shop in Spirit Canyon, South Dakota—when a murder reminds her all that glitters isn't gold . . .

The South Dakota Gold Rush might be long over, but Zo Jones feels like she's hit the mother lode when she and her friends browse an estate sale, where a rare old book about the history of Spirit Canyon is causing quite a commotion. In addition to local stories and secrets, the book may even contain the location of a famous stash of gold—a treasure worth killing for.

Zo's friend Maynard Cline wins the bid on the book, to the chagrin of many interested parties, including the historical society and college history department. But when Zo and Hattie head to Maynard's mansion to borrow the book for a library event, the only thing they find is Maynard—at the bottom of the mountain. The valuable book is gone. Zo knows this must be murder because there's no way a germophobe like Maynard would have voluntarily dived into a pile of dirt. Now she'll have to dig into a new case, and go prospecting for a perpetrator . . .