Free, from New York’s Met.
The Metropolitan Museum of New York has a substantial volume of free downloads addressing the work of significant photographers. One of the finest is the catalog of the 1979 show of 55 of Eliot Porter’s landscape studies, the first show of color photographs ever at the Met.
Porter tends to focus more on intimate details than broad panoramas, the images frequently printed on the dark side, and the gentle appeal of his beautiful abstraction is a joy.
New Mexico. Click the image for the download link.