Terror in Hawk's Village (Time-Stone Travelers)

The fourth book in this exciting time-travel series finds Josh and his siblings transported to the village of a young Aboriginal lad named Hawk. Hawk live among the Ojibway tribe and soon becomes fast friends with Josh and the rest of the kids. They enjoy a day of canoeing and fishing, but when they go to visit the neighboring Dakota tribe, the kids soon discover that all is not right. Will the time-stone travelers be able to save the Ojibway's from a Dakota attack? Will they observe the "day of rest" that they know God wants them to have?