The reproductions are good, but not exceptional. Some of the images lacked the glow - the sense of captured light - seen in higher-end reproductions of the images. This slight deadening of the images was most apparent in Man Ray's wonderful solarized photos - images with a which when reproduced well seem to be lit from within.
Art and photography books are perhaps the least suited for e-commerce as we know it today. Some of my favorite images were not in the Aperture books, and I would have been able to see this before buying by thumbing through the book at a traditional bookstore. Hopefully, as technology advances, Amazon will allow us to "thumb through" these books of images on-line, by being able to view all the images electronically before buying.
All in all, this Aperture series is a good, inexpensive place to get started for someone who would like to see representative images of an artist with whom he or she is unfamiliar. They are not by any means comprehensive works, nor do they have the most beautiful reproductions of some of the mostmemorable images of this century. These books are, however, much less expensive than museum catalogs, have intelligent introductory essays, and are printed passably - they serve a valuable purpose in making the work of these photographers more accessible, and encouraging further exploration into an artist's work.