Book Signs from England

Well, as the Three Dog Night song goes, I never been to England, but I have a spy there now (that part isn't in the song). She's been sending me photos of book-related signs, which I will post now and then.

Reference Books: Not to be taken to other parts of the building

location: Cambridge University Botanic Garden

Alas, the alcove is empty, "despite the pleas that the books not be removed." It is begging, however, to be filled by the viewer (never mind that I can see Mollie's shadow in it). So much potential! What to fill it with? Do tell!