That is what Sells. The USA has a lot of people so selling to us is going to make money even in a niche subject like history. Historians who are not trying to

That is what Sells. The USA has a lot of people so selling to us is going to make money even in a niche subject like history. Historians who are not trying to sell mass market books have a much broader set of books. You won't see them in a normal bookstore.