There's a short piece with slideshow in the New York Times about the current Gisèle Freund show in Berlin, featuring her photographs of postwar Berlin. There are also some interesting early Kodachrome portraits of figures like Henri Matisse and James Joyce, whom we don't see too often in color.
That photo of James Joyce has been reproduced so much in B&W, I never knew it was actually in colour!
Her book "photography and society" is pretty interesting as an introduction to the social importance of photography, but it has a lot of things that are now taken for granted now, so depending on one's level of literacy, it may or may not teach a lot.