Recommended Books:
Lonely Planet Salvador
Lonely Planet Nicaragua & El Salvador
Rough Guide Salvador
The Rough Guide to the Maya World
Lonely Planet Brazil
Brazilian Portuguese: Lonely Planet Phrasebook
Rough Guide Brazil
The Rough Guide to Rio de Janeiro
Lonely Planet South America on a shoestring
Lonely Planet South America on a Shoestring
Rough Guide South America
The Rough Guide to Buenos Aires 1