Britannica Educational Publishing 
Deserts and Steppes [PDF ebook] 

Characterized by uncompromising climate, sparse population density, and extreme aridity, deserts, steppes, and scrublands represent some of the least accessible regions on the planet. However, despite the severity of these ecosystems, they still boast mesmerizing terrains and are capable of supporting diverse animal groups and plant varieties as well as nomadic human inhabitants. This volume tours the alluring landscapes and ecosystems of the unique deserts and steppes of the world and introduces readers to the unique populations that call them home.