Just in case there are any Robert Frank fans that are not aware of this, there is a new book that accompanies the current exhibition at the National Gallery in D.C. I just received mine yesterday and it is by far the most exhaustive look at Frank's work and The Americans in particular (over 500 pages). It's a gold mine. In addition to 40 Photos, B&W Things, some of Peru, The Americans, and miscellaneous other photos, it also contains 83 pages of contact sheets, essays, and many comparisons of cropping from edition to edition of The Americans. Get it before it fades into the OOP lists as all photo books seem to do over time.