Clifford Knight's new "affair" is steeped in the mysterious, garish spell of the Painted Desert. Navajo Canyon, in the Western Navajo Indian Reservation, is one of the few places in America where actual ruins of the ancient cliff dwellers still remain. It was there that Huntoon Rogers went to spend his vacation, supposedly to study and rest. Naturally, he did not expect that a brutal murder would be committed practically on his doorstep,...