FREE: "Millions of documents and books at your fingertips!"
I just downloaded the introduction to Eric Wolf's *Europe and the People without a History*. There were several other complete works of his available.
SKYTRUTH is a bit like GoogleEarth plus science. It is of interest to me because it has material on gold mines and their impacts on the surrounding environment. In its own words, SKYTRUTH focuses on "our changing environment to stimulate changes in habitat protection, biodiversity conservation, and sustainable resource management."