Rioplatense language books

Does anyone have a good list of Rioplatense language books? (English to Spanish)

"Madrigal's Magic Key To Spanish" by Margarita Madrigal.

This is a pretty good book to get you started. It was recommended to me by a fellow musician who happened to marry a woman from Buenos Aires. Some of the "rules" that are mentioned in the book, particularly the use of pronouns, is definitely used here in Argentina. Now... where to find it in Argentina?

The subtitles to movies are an excellent way to learn, too. I have found that it is commonplace that neither side of the fence is true to the actual dialog. Instead, normal colloquialisms are used.

Suerte!