Because after this quote I saw on RPGNet:
From the mid-17th century through the 1920s Chinese novels translated
into Mongolian were in huge demand in Mongolia, and there was a
flourishing trade in them. But the problem for the Mongolian bookbuyers
and booksellers was not only the bidding wars which would break out with
Russian, Mongolian, and Chinese buyers, but that getting the
manuscripts back to Mongolia to sell was difficult because of the very
real chance that those transporting the books would be attacked on the
way back by bandits wanting to get the manuscripts and sell them for
themselves. This resulted in decades of adventurous Mongolian book
traders as skilled with sword and gun as they were at selling books.
The Bookhounds of Mongolia sounds like a badass campaign frame.