The Guggenheim Museum in New York scanned over 200 of your favourite art books. In an effort to digitize its exhibition catalogs and books, the Guggenheim spent more than five years making its content accessible and downloadable. The collection is as vast as it is dense; subjects range from Rubens and the Baroque to Noé and Latin American art. There is also concentrated selection of the avant-garde: Miró, Ernst, Delaunay, and a heavy heaping of Kandinsky. All archives are available for free in PDF and ePub formats at the Internet Archive.