Seeing all the roundographs inside a book was strangely surprising and I'll try to explain why.
I have seen a few of them printed out before of course, but very quickly mounted and framed, in its usual orientation. By contrast, roundographs in a book may be turned around in the hand which, in a way, feels like exploring the image, and so the place.
The focus of a roundograph is of course the part of the scene which is right-way-up: that is the direction the viewer is facing; the rest of the image, no matter how long we look at it, is only on the periphery.
Freely turning the image around alters the viewpoint in the same way as spinning round on the spot did for me, and new features leap out.
I mentioned this before in another post, but seeing the proof copy of the book for the first time really brought it home to me. I saw details I had never noticed before and found myself looking at them as if for the first time.