Presents in two parts, 'Reluctant Ally' and 'Friendly Foe', a comprehensive study of the Mississippi and Missouri rivers as a single ecosystem.Presents in two parts, 'Reluctant Ally' and 'Friendly Foe', a comprehensive study of the Mississippi and Missouri rivers as a single ecosystem.Presents in two parts, 'Reluctant Ally' and 'Friendly Foe', a comprehensive study of the Mississippi and Missouri rivers as a single ecosystem.