A and #147;tribe and #148; of unbelievers, strange cries in the night, large footprints in the canyon, and a series of thefts have Zack and Kayla searching for answers at Thunder Mountain Camp. Who is taking the horses out of the corral at night, and why? The lists of suspects is growing longer every day. Could it be one of the Mohawks, those wild campers in the cabin next to Zack and #146;s? Or could it be Mr. Morgan, the cranky old camp cook whose behavior is anything but normal? What and #146;s up with all the things that have disappeared from the Cherokee cabin that Zack shares with Peter, Luke, and Max? And why does Dave, the counselor, keep telling the boys to be patient? Doesn and #146;t he understand that they have to protect themselves? Everything is not what it seems at this summer camp. Join Zack and the Cherokees and #151;and Kayla, Zack and #146;s younger sister and #151;as they follow the clues that lead to the startling conclusion of the Mystery at Thunder Mountain.