In the public domain for centuries, Camões' works can be found freely available online thanks to the work of libraries worldwide. The most extensive collection of digitized versions of Os Lusiadas is at the Biblioteca Nacional de Portugal (BNP). Here at UC Berkeley, many early editions in Portuguese but also translated into Spanish, Italian, German, and English are housed in The Bancroft Library. Texts in the original and in translation are plentiful in the the Main "Gardner" Stacks.
Camões salva os "Lusíadas" do naufrágio by José de Guimarães,1983. Centro de Arte Moderno Gulbenkian and Biblioteca Nacional de Portugal.
Title page of one of the first printed Portuguese-language edition of Os Lusíadas. Biblioteca Nacional de Portugal.
Front cover of Os Lusíadas grande edição ilustrada (1900) | Roque Gameiro
Front cover of The Lusiads (1880)
Internet Archive (University of Toronto)