Las Venas Abiertas de América Latina (Open Veins of Latin America: Five Centuries of the Pillage of a Continent in the English version) is surely the most famous book of E. Galeano, a classic of Spanish-language literature even few decades after being written. It narrates in black humor tones, by means of historical anecdotes, the colonialist and neocolonialist plundering of the other America, the one south of Río Grande, since Colombus' times.
This masterpiece was ranked number 52,295 by sales in Amazon last friday and by Sunday morning it was ranked just second. This in regard to the English-language edition, the Spanish version is surely better known and, while has also grown, it has done so less spectacularly (possibly because it can be obtained at most local bookshops and libraries and also because many already own a copy).
When in 2006, Chávez pronounced his famous discourse at the UN General Assembly, claiming that the podium, that had been used by GWB still smelled to sulfur, he carried a copy of one of Chomsky's book, also sending it to the bestselling rankings.
You may agree or not with the Venezuelan leader but no doubt that he is a great book-seller.