sentences:  However, Cassie later notices that only Jake has the flashes so Ax says that Jake is the only "real" person - the rest are just a memory.They soon find that the Yeerks have traveled backwards through time as well, and will need both ships to create another "Sario Rip" and return to the right time.Ax takes the Bug Fighter's computer to prevent them from doing so, and the group ventures out into the hostile wilderness, constantly plagued by insects, fire ants, snakes and piranhas.