Vikings, Ruins, and Buried Treasure – Alaska Adventure Series Book 10

In this book, the Snader family heads down to Arizona to setup a vacation home. Since a regular house is too expensive, they purchase a 1986 Winnebago to park on their lot. Unfortunately, the aging motorhome doesn’t even make it to their land and instead, starts on fire along the way.
Matt also visits several controversial archaeological sites with historian Ivan Martin
The group also goes on an expedition in Arizona to find some lost cliff dwelling Indian ruins. When these are finally located
Somewhere on the trip Matt also buries a treasure in the desert. There are subtle clues in the book