Just to add some more dimensions. The question also relates to  where  = 
the "bestseller" was sold.  I seem to remember being told that Bowley's = 
textbook on Mathematical Economics was a "bestseller" in the Soviet = 
Union in the late 1920s and early 1930s. Indeed, it was one of the only = 
economics texts allowed to be imported into the USSR during that period. = 
The version was not a translation.  
 
And what about "translations"? How should they be counted? 
 
Warren Young