Domínio Público is an e-library created by the Brazilian Ministry of education. It allows the download of philosophy and literary classics that are copyright free. It offers Portuguese translations from Shakespeare to Rimbaud and several good Brazilian authors, including the whole production of the great Machado de Assis and some less known children books.
Here is a little list of Brazilian authors you will find there with links to their books. Sorry, guys, I tried to find versions in English and other languages with no success. Personally, I would recommend a visit to dark, mortuary romantic Álvares de Azevedo, to satyrical Bocage, to Lima Barreto, to social observer João do Rio, and, of course, Machado.
Manuel Antônio de Almeida – Memórias de um Sargento de Milícias
Artur Azevedo – A Capital Federal
Rui Barbosa – Obras Seletas
Bocage – Sonetos e Outros Poemas
Pero Vaz de Caminha – A Carta
Cruz e Sousa – A Poesia Interminável
Coelho Neto – A Conquista
Euclides da Cunha – Os Sertões
Gonçalves Dias – Canção do Exílio
Gregório de Matos – Seleção de Obras Poéticas
Júlio Ribeiro – A Carne
João do Rio – A Alma Encantadora das Ruas