Book excerpt: In the rugged terrain of Northern Kenya, virtually isolated from civilization, lives one of the last surviving warrior peoples of Africa. Renowned for their extraordinary physical beauty and grace as much as for their independence and pride, the Samburu are semi-nomadic pastoralists whose lives and intricate social system, with its age-sets, cattle-wealth, circumcision and marriage rituals, have been shaped over time by the fierce climate, by inter-tribal rivalry and by the never-ending search for grazing and water.