It is of a mysterious paper/book sculptor who has been leaving beautiful sculptures around literary service providers in Edinburgh, as encouragement and "in support of libraries, books, words, ideas". No one knows who this person is but they are, without a doubt, talented, creative and generous. It's not only a wonderful thought but each item is executed so beautifully.
Some of the sculptures are below:
See all the sculptures so far at this link.
Edinburgh's STV reports here.
And The Guardian reports here.