Had you heard of fore-edge paintings? I hadn’t. From Karen at hangingtogether.org:
During Merrilee’s and my visit to the Boston Public Library last Friday, Tom Blake and Maura Marx introduced us to the results of the BPL’s digitization of its fore-edge books—books with paintings on their edges that can be viewed only by looking at the sides of the book. Some are “double fore-edge” books – one painting is visible when the leaves are fanned one way, and another painting appears when fanned another way.
The BPL has posted a CC-licensed Flickr set of fore-edge paintings with detailed captions. Love!