Mess in the library: the best kind of mess, the best kind of tidying up 
That's not a mess; I can clearly see both the wall & the floor.....
@ChrisMayLA6 excellent point! Now that you mention it, I realise I don't have one single book on the floor (!), and I'm sure those piles can get much bigger without falling! I've just changed my plans to reading time, instead. Thank you! 