Due to the background of Tamerlan and Dzhokhar Tsarnaev, the half-Chechen half-Avar brothers who bombed the Boston marathon, many Americans are suddenly very interested in the tortured history of the North Caucasus. I can’t credibly claim to be an expert on the multitudinous ethnic and linguistic groups that populate the area, so if you’re looking for in-depth analysis of Chechen politics, a data-driven account of the economics of Dagestan, or a blow-by-blow account of the past 20 years of the region’s history you should look somewhere else. If you’re still wondering “where in God’s name is Chechnya?” or “why are...