Particularly historical nonfiction (ie not exclusively dealing with present day smuggling of drugs etc) and particularly anything discussing unusual types of contraband and the political circumstances creating their black markets.
I would be especially interested in anything about smuggling of cultural goods (books, art, etc) or people (not human trafficking, more along the lines of illegal immigrants or when people helped smuggle Jewish people out of Germany and Poland).
The whole book need not be devoted to this topic, but a few chapters going in depth would be great!
by willingisnotenough