Harl’s plan is to present the steppe people from their own perspective, show how their empires came together and how, in the process, they changed their world and shaped ours. The narrative covers some 4,500 years, ending with the death of Timur, or Tamerlane, in the early 1400s . . . There is no doubting the range and depth of Harl’s knowledge of steppe history, nor his eye for telling detail . . . The book also looks beyond the trilogy of Attila, Genghis Khan and Timur to describe the range of other steppe powers that rose and fell over the centuries