Enjoyed learning about the 4 Steppes (Types: Grassland, Shrub & Montane) of the world in Asia, North America, South America, and Africa - the transition/intersection between the maritime climates to the east to the more arid desert & Mediterranean climates to the west & south. The Climate, Geology, Soils, and extensive info about Flora. Although short, I enjoyed the Plant-People Connection of each Steppe. Origin info of many common plants. Authors visited all of these areas extensively. Have visited the Denver Botanic Gardens once, but plan to go back with more informed eyes!