CAT, the fourth adventure in the Zack Tolliver, FBI series, is set in the magnificent background of the Grand Canyon and the red rock region of western Navajo Land. Zack Tolliver, FBI, rushes home to Tuba City, Arizona when he learns his friend Eagle Feather was attacked by a mountain lion and the client he is guiding seriously injured. Zack knows the only cure for his friend's guilt is to hunt the cat down. But he quickly learns this is no ordinary animal, and it will be no ordinary hunt.