Perhaps because Central Asia is still off the beaten track, it attracts its fair share of travel writers, maybe more than its fair share, from the venerable Colin Thurbon (who has two, The Lost Heart of Asia and Shadow of the Silk Road), two by horse (The Last Secrets of the Silk Road by Alexandra Tolstoy and On the Trail of Genghis Khan: An Epic Journey Through the Land of the Nomads by Tim Cope) and the cleverly-entitled Out of Steppe by Daniel Metcalfe and Postcards from Stanland by David Mould. Fortunately for Erika Fatland, the region is changing so quickly that no one, not even Thurbon, remains definitive for long: there’s always room for a new entry.