Checking in at Little Free Library’s Facebook page is always fun, but a post yesterday was so mesmerizing that even the LFL folks couldn’t resist exclaiming: “Is this the most amazing, stupendously clever, epic, mechanically excellent (?!) and stunningly cool Little Free Library ever? It’s a kinetic sculpture! A neighborhood art piece! Destined for the Museum of Modern Art? The Walker? The Guggenheim? Have you ever seen anything this fab?”