Books in general are very much more expensive here than in the USA, but with extra baggage charges it probably makes very little sense to try and bring a tonne of books with you, unless your company is paying for a container, in which case I'd stuff it to the gills!
However, Amazon does deliver to Argentina, it can take some time (a month or so for delivery) but they do arrive, so you're probably best off bringing some books, buying some here, and buying some online to supplement.