Someone is anonymously leaving paper sculptures in libraries in Scotland:

One day in March, staff at the Scottish Poetry Library came across a wonderful creation, left anonymously on a table in the library. Carved from paper, mounted on a book and with a tag addressed to @byleaveswelive – the library's Twitter account – reading:

It started with your name @byleaveswelive and became a tree.… 
… We know that a library is so much more than a building full of books… a book is so much more than pages full of words.… 
This is for you in support of libraries, books, words, ideas….. a gesture (poetic maybe?)