This is another nice resource. Google has, on their book archive, a number of texts related to the Basques. These tend to be older books that are out of copyright, which means you aren’t going to find Kurlansky’s The Basque History of the World, but you will find a number of gems. In particular, there are a lot of texts — all of which can be downloaded in either PDF or plain text format — that describe the Basque Country of the late 1800s and early 1900s, or the history of the Basque Country as viewed at that time. Two particular items of note are books on legends and folktales of the Basques:

• Basque Legends by Wentworth Webster
• Legends and Popular Tales of the Basque People by Mariana Monteiro

As with the Life photo archive, if anyone finds other gems buried in the archive, please share!